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Birds can perch safely on high tension electric cables without being electrocuted because:

Birds withstand high potential difference.

Very little currents flow in the high tension cables.

Very little currents flows through the body of the bird.

The legs of birds are well insulated.

What is the primary function of the earth wire in a three-pin plug for an electrical appliance?

To carry the normal operating current of the appliance.

To provide a low-resistance path for current to flow to the ground in case of a fault.

To increase the appliance's power efficiency.

To regulate the voltage supplied to the appliance.

What happens to the voltage in a parallel circuit?

It's divided among the branches.

It's the same across each parallel branch.

It increases across each branch.

It decreases across each branch.

What is the SI unit of electric power?

Watt.

Volt-ampere.

Kilowatt-hour.

Joule.

What is electric power?

The rate at which voltage is supplied.

The rate at which current flows.

The rate at which resistance is offered.

The rate at which electrical energy is consumed or dissipated.