Question: In a circuit, if the voltage is increased from 5V to 15V while the resistance remains constant at 5 ohms, what is the change in current?

Options:

1. Increases by 1 A
2. Increases by 2 A
3. Increases by 3 A
4. Increases by 4 A

Correct Answer: Increases by 3 A

Solution:

Initial current I1 = 5V / 5Ω = 1 A; Final current I2 = 15V / 5Ω = 3 A; Change in current = I2 - I1 = 3 A - 1 A = 2 A.