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Ohm's law states the relationship between:

Current, voltage, and resistance.

Resistance and time.

Voltage and power.

Current and power.

What is the SI unit of potential difference?

Ohm.

Coulomb.

Volt.

Ampere.

Two resistors, 3 Ω and 6 Ω, are connected in parallel. What is the total resistance?

18 Ω.

9 Ω.

2 Ω.

3 Ω.

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

To regulate the voltage supplied to the appliance.

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

To carry the normal operating current of the appliance.

To increase the appliance's power efficiency.

What happens to the voltage in a parallel circuit?

It increases across each branch.

It decreases across each branch.

It's divided among the branches.

It's the same across each parallel branch.