Question

A car headlamp of 48 W works on the car battery of 12 V. The correct fuse for the circuit of this car headlamp will be ______.

Options

• 5 A

• 10 A

• 3 A

• 13 A

Answer 1

A car headlamp of 48 W works on the car battery of 12 V. The correct fuse for the circuit of this car headlamp will be 5 A.

Explanation:

Given: Power (P) = 48 W

Voltage (V) = 12 V

We know that,

Power (P) = Voltage (V) × Current (I)

⇒ I = `P/V`

⇒ I = `48/12`

⇒ I = 4 A

A 5 A fuse is slightly above 4 A. It allows normal operation while providing reliable safety.