Electricity

Full form of MCB is

• miniature circuit breaker

• most circuit breaker

• maximum circuit breaker

• none of these

Which component of a circuit converts chemical energy into electrical energy?

• Electric cell

• Electric bell

• Connecting wires

• Electric switch

Which of the following appliances does not use the heating effect of current?

• Electric heater

• Electric bell

• Electric geyser

• Electric bulb

Name the metal used to make filament of a bulb.

Who discovered heating effect of electric current?

• Thomas Alva Edison

• James Prescott Joule

• Andre Marie Ampere

• Alessandro Volta

The element of electric iron is made of copper.

• TRUE

• FALSE

Name the material used to make fuse wire.

• Tin

• Copper

• Tungsten

• Alloy of tin and lead

What is the SI unit of current?

• Ampere

• Volt

• Joule

• Calorie

Name the appliance which detects the presence of current in the circuit.

• Electric bulb

• Electric cell

• Electric switch

• Ammeter

__________ automatically trips when there is excess of current in the circuit.