what is SI unit of current, ohm, watt, volt, ampere, device used to meassure current, voltmeter, ammeter, thermometer, barometer, which is not a conductor, copper, aluminium, silver, plastic, which metal used as filament in bulb, copper, nichrome, iron, tungsten, Which device protects electrical appliances from excessive current?, fuse, cell, bulb, battery, Which appliance works mainly on the heating effect of electric current?, heater, electric bell, fan, motor, Which of the following is a rechargeable cell?, torch battery, TV remote battery, mobile phone battery, clock battery, Which of the following is an insulator?, copper, wood, iorn, carbon, which is not a component of electric circuitre, cell, bulb, wire, iron nail

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