Class Test - Electricity

Name a device that helps to maintain a potential difference across a conductor.

• voltmeter

• Ammeter

• Cell

• Bulb

How much energy is given to each coulomb of charge passing through a 6 V battery?

• 6 J

• 60 J

• 6.023 J

• 1 J

What is meant by saying that the potential difference between two points is 1 V?

How much work is done in moving a charge of 2 C across two points having a potential difference 12 V?

• 12 J

• 24 J

• 2 J

• 6 J

A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. Find the amount of electric charge that flows through the circuit.

• 0.5 C

• 10 C

• 30 C

• 300 C

Calculate the number of electrons constituting one coulomb of charge.

When electric current is passed, electrons move from:

• high potential to low potential.

• low potential to high potential.

• in the direction of the current.

• against the direction of the current

The electrical resistance of insulators is

• high

• low

• zero

• infinitely high

Electric potential is a:

• scalar quantity

• vector quantity

• neither scalar nor vector

• sometimes scalar and sometimes vector.

1 mV is equal to:

• 10 volt

• 1000 Volt

• 10 ^-3 Volt

• 10^ -6 Volt