Basic Electricity www assignmentpoint com ELECTRICITY n Value

Basic Electricity www. assignmentpoint. com

ELECTRICITY n. Value of mains supply = 230 V www. assignmentpoint. com

ELECTRICITY Fuse is used as a safety device Prevents too much current flowing in circuit. www. assignmentpoint. com

ELECTRICITY Power of appliances measured in watts (W) www. assignmentpoint. com

ELECTRICITY Plug wires – colours Live – brown Neutral – blue Earth – green/yellow Fuse in live position www. assignmentpoint. com

ELECTRICITY Double insulation – no earth wire required as casing of appliance is plastic –non conductor www. assignmentpoint. com

ELECTRICITY Human being is a conductor of electricity so do not touch wires , do not come into contact with water with electricity. www. assignmentpoint. com

Electricity n. PARTS OF THE RADIO n 1. AERIAL - PICKS UP ALL SIGNALS n 2. TUNER – SELECTS ONE PARTICULAR SIGNAL www. assignmentpoint. com

TELECOM n 3. DECODER – SEPARATES CARRIER WAVE FROM AUDIO WAVE n 4. AMPLIFIER – MAKES BIGGER COPY OF AUDIO WAVE www. assignmentpoint. com

TELECOM n 5. BATTERY – SUPPLIES ENERGY TO AMPLIFIER n 6. LOUDSPEAKER – CHANGES ELECTRICAL ENERGY TO SOUND ENERGY www. assignmentpoint. com

TELECOM n. COLOUR MIXING n 3 PRIMARY COLOURS – RED , GREEN , BLUE TOGETHER MAKE WHITE www. assignmentpoint. com

TELECOM n. RED AND GREEN GIVE YELLOW. n. RED AND BLUE GIVE MAGENTA n. GREEN AND BLUE GIVE CYAN www. assignmentpoint. com

TELECOM n. GEOSTATIONARY SATELLITES ARE AT A HEIGHT OF 36 , 000 Km ABOVE THE EARTH n. THEY HAVE A 24 HR ORBIT www. assignmentpoint. com

TELECOM n. SIGNALS ARE MICROWAVE AND TRAVEL IN A STRAIGHT LINE TO AND FROM THE SATELLITE. THEY CANNOT CURVE IN THE EARTH`S ATMOSPHERE www. assignmentpoint. com

TELECOM n. OPTICAL FIBRES USED TO CARRY INFORMATION BY TOTAL INTERNAL REFLECTION. LIGHT TRAVELS AT A SPEED OF 200 , 000 M/S www. assignmentpoint. com

ELECTRICITY n EQUATIONS n. Q =Ix. T V=Ix. R n. P = I x V P=E/t n P = V 2 / R P = I 2 R n RT = R 1 + R 2 n 1 /RT = 1/R 1 + 1/R 2 www. assignmentpoint. com

ELECTRICITY RULES FOR SERIES AND PARALLEL CIRCUITS n VOLTAGE SPLITS UP IN A SERIES CIRCUIT n CURRENT STAYS THE SAME IN A SERIES CIRCUIT n VOLTAGE STAYS THE SAME IN A PARALLEL CIRCUIT n CURRENT SPLITS UP IN A PARALLEL CIRCUIT n www. assignmentpoint. com

ELECTRICITY n VOLTMETERS MEASURE VOLTAGE AND GO ACROSS THE COMPONENT n AMMETERS MEASURE CURRENT AND ARE WIRED IN SERIES WITH THE COMPONENTS. n CIRCUIT COMPONENTS INCLUDE RESISTORS , BULBS ETC. www. assignmentpoint. com

ELECTRICITY MAINS ELECTRICITY n WIRES IN THREE PIN PLUG n 1. BROWN LIVE 2. BLUE NEUTRAL n 3. GREEN / YELLOW EARTH n FUSE IS A SAFETY DEVICE WIRED IN THE n LIVE PIN n EARTH WIRE NOT NEEDED FOR DOUBLE INSULATED APPLIANCES , THEY HAVE A PLASTIC CASING n www. assignmentpoint. com

ELECTRICITY n MAINS ELECTRICITY n THREE TYPES OF CIRCUIT n 1. THE LIGHTING CIRCUIT 15 A FUSE 2. THE RING MAINS CIRCUIT 30 A FUSE 3. THE COOKER CIRCUIT 45 A FUSE n ALL ARE WIRED IN PARALLEL IF ONE GOES OUT THE OTHERS STAY ON LESS WIRE USED SO MONEY IS SAVED www. assignmentpoint. com

ELECTRICITY n ELECTRIC MOTORS n COIL OF WIRE CARRYING CURRENT SURROUNDED BY A PAIR OF MAGNETS n THE MORE TURNS ON THE COIL AND THE STRONGER THE MAGNET , THE FASTER THE COIL GOES. www. assignmentpoint. com

ELECTRICITY n TWO COILS OF WIRE WITH AN IRON CORE , THE PRIMARY COIL AND THE SECONDARY COIL n TRANSFORMERS n NP /NS = VP / VS n IP x V P = I S x V S www. assignmentpoint. com

HEALTH n TYPES OF THERMOMETER n 1. THE LAB THERMOMETER 2. THE CLINICAL THERMOMETER BOTH LIQUID IN GLASS THERMOMETERS 3. THE DIGITAL THERMOMETER n DIFFERENCE BETWEEN LAB AND CLINICAL THERMOMETERS, SIZE, SCALE, MAGNIFIER IN CLINICAL THERMOMETER, KINK www. assignmentpoint. com