### Tridib K Male, 57 Years

Associated for 5 Years 6 Months
Dedicated Tutor
Competitive Exams Tutor

#### Activity Score - 386

• I teach at My Home
Area: 4 More
Location: Howrah, India
Qualification :
• B.Tech/B.E. (Jalpaiguri Govt. Engg. College - 1985)
• Total Experience:
22 Years
• Hourly Fees:
INR 200
Tutoring Experience :

Got engineering degree from JGEC in the year of 1985. From 1990 to till date I am providing training of all types competitive and Board Exam in science subject only. Have vast experience from last 27 yrs.

Tutoring Option :
Home Tuition Only
Tutoring Approach :

Science Class at Howrah Provide special science class for those students who are interested to conduct the class as individual or group. Fees are reasonable. Students of Class IX to Engg./Medical entrance students and SSC entrance students are most welcome. Special time schedule can be provided for students who are need in their studies

Teaches:
 Class 9 - 10 Mathematics Physics Chemistry All Boards INR 100 / Hour Class 11 - 12 Physics All Boards INR 120 / Hour Engineering Entrance & IITJEE Physics WBJEE West Bengal JEE INR 150 / Hour Test Preparation NEET INR 120 / Hour Medical Entrance & AIPMT Physics INR 120 / Hour Competitive Exams SSC Exams INR 200 / Hour
• ## Question: Explain Magnetic coil Galvonometer?

Posted in: Physics | Date: 16/02/2017

magnetic coil galvanometer is actually an electromechanical device that is used to measure a small curent through the conductor as well as small voltage

• ## Question: What will be the focal length of a lens whose power is given as + 2.0 D?

Posted in: Physics | Date: 22/02/2017

Focal length f=1/p=1/2m=0.5m

• ## Question: How does the strength of the magnetic field at the centre of a circular coil of ...

Posted in: Physics | Date: 22/02/2017

as radius increases magnetic field decreases

• ## Question: what is function of second plate in a parrallel plate capacitor?

Posted in: Physics | Date: 22/02/2017

In 2nd plate opposite charge will be generated thus a capacitor will be produced.

• ## Question: why is a potentiometer preferred our a volt measure eng a call?How can a galvan...

Posted in: Physics | Date: 26/02/2017

Potentiometre is used to compare the e.m.f of cells while galvanometre is used as voltmetre or ammetre by connecting parellel or series with the circuits accordingly.

• ## Question: why lightning conductors are arranged at the top of the building?

Posted in: Physics | Date: 26/02/2017

It acts as a conducting path of charge from high potential to zero potential through the conductor without damaging the building itself.

• ## Question: why sulphur is a dielectric?

Posted in: Physics | Date: 26/02/2017

It has two unpaired electrons in its outermost shell.

• ## Question: main differences b/w charge and mass

Posted in: Physics | Date: 26/02/2017

Charge can be positive, negative and zero, but Mass is always positive. Force between the two Charges can be Attractive or Repulsive but force between two masses is always attractive. Charge is a derive quantity while mass is a fundamental quantity.

• ## Question: Name the source from which the earth receives ultraviolet radiation.

Posted in: Physics | Date: 26/02/2017

Sun

• ## Question: A bullet fired at an angle of 30° with the horizontal hits the ground 3km away....

Posted in: Physics | Date: 26/02/2017

It's not posiible as max distance is approx 3.6 km which is less than 5 Km

• ## Question: An aircraft is flying at a height of 3400 m above the ground. If the angle subte...

Posted in: Physics | Date: 26/02/2017

Speed of the aircraft=182.2 m/s

• ## Question: A man walking with speed 'v' constant in magnitude and direction passes under a ...

Posted in: Physics | Date: 26/02/2017

Ans: Required velocity v' = v.h / H

• ## Question: What are the advantages and limitations of solar cookers?

Posted in: Physics | Date: 26/02/2017

• high performance
• no fuel
• eco-friendly
• one time investment

• can't be used in cloudy weather
• take longer to cook
• need to learn special methods to cook

• ## Question: What are the characteristics of Jovian planets?

Posted in: Physics | Date: 02/03/2017

Jovian planets are gaseous.large in size. Ring system is present. Have larger no of moon. Density low. They are the outer 4 planets

• ## Question: How can we locate the Pole Star in the sky at night?

Posted in: Physics | Date: 02/03/2017

Using saptarishi mandala/bigg dipper or the brightest star.

• ## Question: what is modulation?why is it necessarily needed? name the four methods of modula...

Posted in: Physics | Date: 02/03/2017

Modulation- it is process by which some characteristics of high frequency carrier wave is changed acoording to the low frequency modulating wave. modulation is necessary for transnmission of massege signal using radio waves. there r for types of modulatio - phase,frequency amplitude,digital modulation

• ## Question: Explain the statement: Half-life of polonium is 3.8 days.

Posted in: Physics | Date: 20/05/2017

Half life simply means that time after which quantity of matter will become half due continuous decay. In this case the polonium amount will be left half after 3.8 days.

• ## Question: What is meant by quality factor of an LCR circuit?

Posted in: Physics | Date: 20/05/2017

LCR circuits are used as tuning circuits. What this means is the FM tuning knob on a Radio is connected to a variable capacitor. The impedence of a LCR circuit is given by X=sqrt(r^2+(wL-1/wC)^2), where w=2pif. So, at a particular value of w, (wL-1/wC) becomes zero and the LCR circuit behaves like a perfectly resistive circuit. At this condition the quality factor (Q= wL/R) of a LCR circuit is maximum and the LCR forms a good narrow pass filter and as a result only one station is captured and the sound quality is really good. [ - ]

• ## Question: What conclusion can be drawn from Davisson and Germer’s experiment?

Posted in: Physics | Date: 20/05/2017

wave particle duality

• ## Question: What is the symbol of a NOR gate?

Posted in: Physics | Date: 20/05/2017

or gate with cirle at front

• ## Question: Which instrument is used to determine the intensity of colours ?

Posted in: Physics | Date: 20/05/2017

colorimeter

• ## Question: Which instrument is used to measure the scattering of light by particles suspend...

Posted in: Physics | Date: 20/05/2017

Nephetometer

• ## Question: Name of the instrument to measure atomspheric pressure ?

Posted in: Physics | Date: 20/05/2017

Barometer.

• ## Question: Define time constant of an RC circuit.

Posted in: Physics | Date: 20/05/2017

T=R*C

• ## Question: What are isotones?

Posted in: Physics | Date: 20/05/2017

Two nuclides are isotones if they have the same neutron number N, but different proton number Z.

• ## Question: What is meant by resolving power of a telescope?

Posted in: Physics | Date: 20/05/2017

to distinguish between two different images

• ## Question: What type of wave front is associated with a line source of light?

Posted in: Physics | Date: 20/05/2017

cylindrical wavefront

• ## Question: Distinguish between intrinsic and extrinsic semiconductors.

Posted in: Physics | Date: 20/05/2017

instrinsic semiconductors are pure semiconductors where as extrinsic semiconductors are doped semiconductors

• ## Question: Define capacitor reactance.

Posted in: Physics | Date: 20/05/2017

Xc= 1/(WC)

• ## Question: State Ampere’s circuital law.

Posted in: Physics | Date: 20/05/2017

The line integral of the magnetic field around some closed loop is equal to the times the algebraic sum of the currents which pass through the loop.

• ## Question: State and explain Gauss’s law.

Posted in: Physics | Date: 20/05/2017

The total electric flux out of a closed surface is equal to the net charge enclosed by that closed surface divided by the permittivity of medium

• ## Question: Define electric flux.

Posted in: Physics | Date: 20/05/2017

number of electric field lines passing through a particular surface area

• ## Question: What dose a polaroid consist of?

Posted in: Physics | Date: 20/05/2017

Polaroid consists of long-chain hydrocarbon molecules aligned in one direction through a heat-treatment process.

• ## Question: State Biot – Savart law.

Posted in: Physics | Date: 20/05/2017

The magnetic intensity at any point due to a steady current in an infinitely long straight wire is directly proportional to the current and inversely proportional to the distance from point to wire.

• ## Question: What is the difference between the Range of a Projectile and the Maximum displac...

Posted in: Physics | Date: 21/05/2017

Range of a projectile is equals to that the maximum displacement achieved by it.

• ## Question: Why doesn't work value increase if you increase speed of box sliding down a ramp...

Posted in: Physics | Date: 22/05/2017

Speed of box sliding down the ramp is increased by acceleration due to gravity. There is no external force and the energy is conserved. From wok-energy theorem work is conserved also.

• ## Question: Does sound slow down in air or does it disperse?

Posted in: Physics | Date: 22/05/2017

They don't slow down but they do lose energy.

• ## Question: What is actually the real meaning and significance of torque?

Posted in: Physics | Date: 22/05/2017

It is the product of tangential force and radius of rotation. Torque is defined as a twisting force that tends to cause rotation.

• ## Question: Why is kinetic energy not conserved during an inelastic collision?

Posted in: Physics | Date: 22/05/2017

In inelastic collision some of the kinetic energy is converted into the heat, sound energy at the time of collision. Hence, the kinetic energy is not conserved during inelastic collision.

• ## Question: How is power defined?

Posted in: Physics | Date: 22/05/2017

Work done per unit time.

• ## Question: What is meant by corrosion of iron?

Posted in: Physics | Date: 22/05/2017

formation of ferus oxide with reaction with iron moisture and air.

• ## Question: How is corrosion of iron prevented by coating i with a layer of oil?

Posted in: Physics | Date: 22/05/2017

Oil prevents corrosion to come in contact of iron with air and moisture to make rusting.

• ## Question: How does the strength of the magnetic field at the centre of a circular coil of ...

Posted in: Physics | Date: 22/05/2017

Strength of magnetic field is directly proportional to the no. of turns in the coil.

• ## Question: What are shooting starts called if they reach the surface of the earth?

Posted in: Physics | Date: 22/05/2017

Meteorites.

• ## Question: How do shooting starts acquire brightness?

Posted in: Physics | Date: 22/05/2017

Air friction offered by the atmospheric gases

• ## Question: What is meant by the term "shooting starts"?

Posted in: Physics | Date: 22/05/2017

Shooting Star is a small rapidly moving meteor, burning up on entering the earth's surface.

• ## Question: What is meant by the photosphere of our Sun?

Posted in: Physics | Date: 22/05/2017

The outer visible surface of sun is called photosphere .

• ## Question: Which planet in the Solar System that has the greatest number of moons?

Posted in: Physics | Date: 22/05/2017

jupiter-63 moons

• ## Question: What is the hindrance in developing wind power and power of water flow?

Posted in: Physics | Date: 22/05/2017

In both the common problem is continuity. Wind flow is a variable factor also same for the water flow. So the power generation would be discontinuous and discrete. Also there is problem with a constant frequency power which is required by the electrical equipment s to work. But this issue can be solved using power electronics circuit.

• ## Question: What are the comparisons of wind power and power of water flow in respect of gen...

Posted in: Physics | Date: 22/05/2017

power of water flow is higher than that of wind power for same flow rate as density of water is higher than air .

• ## Question: Which part of India where wind energy is commercially harnessed?

Posted in: Physics | Date: 22/05/2017

Tamilnadu, Maharashtra, Gujarat, Rajasthan, Madhya pardesh, Kerala, Odisha, and some other states also undertaking this

• ## Question: What is the difference between primitive law and modern law?

Posted in: Sociology | Date: 28/05/2017

Primitive laws are more repressive and punitive in nature, while modern laws are more restitutive and reformative.

• ## Question: Why Gross Calorific Value is greater than Net Calorific Value?

Posted in: B.Tech Tuition | Date: 28/05/2017

The lower calorific value or Net calorific value (NCV) which supposes that the products of combustion contain the water of combustion to the vapor state. The heat contained in this water is not recovered. The higher calorific value or Gross calorific value (GCV) which supposes that the water of combustion is entirely condensed. The heat contained in this water is recovered.

• ## Question: Which is the best coaching center for B.Tech. Tuition in Kolkata?

Posted in: B.Tech Tuition | Date: 28/05/2017

• ## Question: How to calculate angle between two vectors?

Posted in: Physics | Date: 28/05/2017

The cosine of the angle between two vectors is equal to the dot product of this vectors divided by the product of vector magnitude. Angle between two vectors a and b- formula cos α = a·b/ |a|·|b|.

• ## Question: Is the absolute speed of light invariant or its speed relative to us?

Posted in: Physics | Date: 28/05/2017

The absolute value of speed of the light is invariant. So it is an absolute velocity in the universe.

• ## Question: What is the difference between 1 amp under 1 volt and 1 amp under 2 volts?

Posted in: Physics | Date: 28/05/2017

1A under 1V :- resistance must be 1 ohm Likewise 1A under 2 V :- resistance must be 2 ohm

• ## Question: Does the particle have magnetic poles?

Posted in: Physics | Date: 28/05/2017

Particles have no magnetic pole because electrons inside the particle does not oriented unidirectional, one magnetic moment of electron cancel by other generally.

• ## Question: Is there any way to decrease the density of metals other than increasing the tem...

Posted in: Physics | Date: 28/05/2017

By increasing the volume we can reduce the density

• ## Question: In static electricity, if an object becomes charged, does it become ions?

Posted in: Physics | Date: 28/05/2017

When the object gets charged then it will be either positively charged body or negatively charged body., does not become an ion.

• ## Question: Do the heavier elements have a greater affinity for neutron capture and is there...

Posted in: Physics | Date: 28/05/2017

Its all depends on density and behavior of metal

• ## Question: Why does a cut diamond shine more than a glass piece with diamond cut?

Posted in: Physics | Date: 28/05/2017

The refractive index of diamond is more than glass

• ## Question: What is meant by 'critical angle' for a ray of light going from one medium into ...

Posted in: Physics | Date: 28/05/2017

When light travels from denser to rarer medium, the angle of incidence at which angle of refraction is 90 degree is called critical angle of incidence .

• ## Question: What is Faraday’s constant for electrolytic reactions?

Posted in: Physics | Date: 28/05/2017

Charge of one mole of electron is known as faradays constant

• ## Question: What are electrolytes?

Posted in: Physics | Date: 28/05/2017

An electrolyte when dissolved in water gets ionised, to produce electrically conducting solution.

• ## Question: Which type of orbit is suitable for a geostationary satellite?

Posted in: Physics | Date: 28/05/2017

Geosynchronous orbit.

• ## Question: What are the differences between a natural satellite and an artificial satellite...

Posted in: Physics | Date: 28/05/2017

Natural satellites are formed by nature like moon while Artificial satellites are man made like communication satellites

• ## Question: What are the two common shapes of galaxies?

Posted in: Physics | Date: 28/05/2017

Elliptical and spiral galaxies

• ## Question: Which two other planets of the Solar System are similar to the Earth in composit...

Posted in: Physics | Date: 28/05/2017

Mars and Venus

• ## Question: Why metals conduct electricity?

Posted in: Physics | Date: 28/05/2017

because of free electrons

• ## Question: How is astigmatism defect counteracted?

Posted in: Physics | Date: 28/05/2017

Astigmatism may be corrected with eyeglasses, contact lenses, or refractive surgery

• ## Question: Which type of these satellite orbitals will be suitable for collecting data for ...

Posted in: Physics | Date: 28/05/2017

Geostationary satellites

• ## Question: What force makes an apple on a tree to fall to the ground?

Posted in: Physics | Date: 28/05/2017

Gravitational force

• ## Question: What type of forces keep the Sun and its planets in their respective places?

Posted in: Physics | Date: 28/05/2017

centripetal ,centrifugal and gravitational force

• ## Question: What is an electric motor?

Posted in: Physics | Date: 28/05/2017

Electric motor is a device which converts electrical energy into mechanical energy .

• ## Question: How is the strength of the magnetic field at a point near a wire related to the ...

Posted in: Physics | Date: 29/05/2017

The strength of magnetic field near a current carrying conductor is directly proportional to the current flowing through the wire.

• ## Question: How is a simple microscope different from a compound microscope in construction ...

Posted in: Physics | Date: 29/05/2017

A simple microscope only has one type of lens, usually objective lens, but a compound microscope had both objective and eyepiece. In simple microscope magnification is same as of object lens whereas in compound microscope magnification is the product of M.P of objective and M.P of eyepiece.

• ## Question: What is the corona of the Sun and when can it be seen?

Posted in: Physics | Date: 29/05/2017

The corona is an aura that surrounds the sun.It is most easily seen during a total solar eclipse, but it is also observable with a corona graph.

• ## Question: How is the shape of our galaxy described?

Posted in: Physics | Date: 29/05/2017

as our galaxy performs a elliptical orbital motion for this reasion shape is is not perfect spherical, it is spiral.

• ## Question: What are complementary colours of light?

Posted in: Physics | Date: 29/05/2017

Complementary colours are the combination of primary colour produces white colour.

• ## Question: What are the primary colours of light?

Posted in: Physics | Date: 29/05/2017

Light when passed through crystal surface it get split into 7 colours that is VIBGYOR, out of them 3 are the primary colours. They are RED, BLUE GREEN. These are the colours which cannot be created by mixing any other colours.

• ## Question: Which type of nuclear process is currently used in nuclear electricity generator...

Posted in: Physics | Date: 29/05/2017

The process of nuclear fission of radioactive material is currently used in nuclear power generator to produce Electricity.

• ## Question: To which galaxy does our earth belong?

Posted in: Physics | Date: 29/05/2017

Earth belongs to a galaxy called 'Milky way'. Our earth is a planet of solar system, and this solar system is a part of milkyway galaxy. In universe a large no. of galaxy exist out of which milkyway is one of them

• ## Question: How can it be shown that a magnetic field exists around a wire through which a d...

Posted in: Physics | Date: 29/05/2017

If we bring a compass needle near wire and it shows deflection which proves that there is magnetic field due to current carrying wire .The deflection is made due to the force of attraction or repulsion by magnetic field made by the d.c and the presence of a magnet in compass.

• ## Question: When we shoot from the gun we fall backward. Why? Give reason

Posted in: Physics | Date: 12/10/2018

Gun recoils as it obeys the conservation of momentum principle.

• ## Question: Difference Between P type and N type semiconductor

Posted in: Physics | Date: 23/12/2018

Where majority carrier is hole the semiconductor is said to be a p type semiconductor and where electron is the majority carrier the semiconductor is said to be a n type semiconductor.