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Basic Electricity

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Published in: Physics
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This presentation reflects some important and basic facts based on electricity

Debarun S / Kolkata

10 years of teaching experience

Qualification: B.Tech

Teaches: Computer, Mathematics, Science, Chemistry, Computer Science, Physics, School Level Computer, Defence Exams, IBPS, Insurance Exams, SSC Exams

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  1. ELECTRICITY Value of mains supply = 230V
  2. ELECTRICITY se IS used as a safety device Prevents too much current flowing in circuit.
  3. ELECTRICITY Power of appliances measured in watts (W)
  4. ELECTRICITY Plug wires — colours Live — brown Neutral — blue Earth — green/yellow Fuse in live Dosition
  5. ELECTRICITY OÖÜ51e insulation — no earth wire required as casing of appliance is plastic -non conductor
  6. ELECTRICITY Flüman being is a conductor of electricity so do not touch wires Ido not come into contact with water with electricity.
  7. Electricity OAR TS OF THE RADIO 31. AERIAL - PICKS UP ALL SIGNALS 32. TUNER - SELECTS ONE PARTICULAR SIGNAL
  8. TELECOM 73. DECODER - SEPARATES CARRIER WAVE FROM AUDIO WAVE 4. AMPLIFIER - MAKES BIGGER COPY OF AUDIO WAVE
  9. TELECOM 35. BÄfiERY - SUPPLIES ENERGY -ro AMPLIFIER 36. LOUDSPEAKER — CHANGES ELECTRICAL ENERGY -ro SOUND ENERGY
  10. TELECOM —ICOLOUR MIXING 33 PRIMARY COLOURS - RED , GREEN BLUE TOGETHER MAKE WHITE
  11. TELECOM AND GREEN GIVE YELLOW. AND BLUE GIVE MAGENTA JGREEN AND BLUE GIVE CYAN
  12. TELECOM JGEOSTATIONARY SATELLITES ARE AT A HEIGHT OF 36 OOOKm ABOVE THE EARTH JTHEY HAVE A 24 HR ORBIT
  13. TELECOM SIGNALS ARE MICROWAVE AND TRAVEL IN A STRAIGHT LINE -ro AND FROM THE SATELLITE.THEY CANNOT CURVE IN THE EARTH' S ATMOSPHERE
  14. TELECOM JOPCICAL FIBRES USED TO CARRY INFORMATION BY TOTAL INTERNAL REFLECTION. LIGHT TRAVELS AT A SPEED OF 200 000 000 M/S
  15. ELECTRICITY EQUATIONS AQ=1xT V = 1 x R ZP=1xV P = E/ t p = V2/ R p = 12R —l RT = RI + R2 1 /RT = I/RI + 1/R2
  16. ELECTRICITY SERIES AND PARALLEL CIRCUITS VOLTAGE SPLITS UP IN A SERIES CIRCUIT CURRENT STAYS THE SAME IN A SERIES CIRCUIT VOLTAGE STAYS THE SAME IN A PARALLEL CIRCUIT -J CURRENT SPLITS UP IN A PARALLEL CIRCUIT
  17. ELECTRICITY vor PIF [ERs MEASURE VOLTAGE AND GO ACROSS THE COMPONENT AMMETERS MEASURE CURRENT AND ARE WIRED IN SERIES WITH THE COMPONENTS. CIRCUIT COMPONENTS INCLUDE RESISTORS , BULBS ETC.
  18. ELECTRICITY -l MAINS ELECTRICIIY -J WIRES IN THREE PIN PLUG -J 1. BROWN LIVE 2. BLUE NEUTRAL 3. GREEN / YELLOW EARTH FUSE IS A SAFETY DEVICE WIRED IN THE -J LIVE PIN -I EARTH WIRE NOT NEEDED FOR DOUBLE INSULATED APPLIANCES , THEY HAVE A PLASTIC CASING
  19. ELECTRICITY MAINS ELECTRICITY THREE TYPES OF CIRCUIT 1. THE LIGHTING CIRCUIT 15A FUSE 2. THE RING MAINS CIRCUIT 30A FUSE 3. THE COOKER CIRCUIT 45A FUSE ALL ARE WIRED IN PARALLEL IF ONE GOES OUT THE OTHERS STAY ON LESS WIRE USED SO MONEY IS SAVED
  20. ELECTRICITY ELECTRIC MOTORS COIL OF WIRE CARRYING CURRENT SURROUNDED BY A PAIR OF MAGNETS THE MORE TURNS ON THE COIL AND THE STRONGER THE MAGNET , THE FASTER THE COIL GOES.
  21. ELECTRICITY -t r,ÖILS OF WIRE WITH AN IRON CORE , THE PRIMARY COIL AND THE SECONDARY COIL TRANSFORMERS Ip x Vp = Is x Vs
  22. OF THERMOMETER 1. THE LAB THERMOMETER 2. THE CLINICAL THERMOMETER BOTH LIQUID IN GLASS THERMOMETERS 3. THE DIGITAL THERMOMETER DIFFERENCE BETWEEN LAB AND CLINICAL THERMOMETERS, SIZE,SCALE, MAGNIFIER IN CLINICAL THERMOMETER,KINK
  23. N/A

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