Question

Bulb glows only in

• A. closed circuit
• B. open circuit
• C. in both circuits
• D. open circuit if bulb is not fused

Answer 1

The correct option is A

closed circuit

The explanation for the correct option:

1. In a complete circuit, the light bulb glows because the current is flowing.
2. A light bulb requires a sufficient current flow to light up.
3. As the current moves, the lightbulb's filament begins to heat up and glow, giving off heat and light.
4. Hence, the bulb glows in a closed circuit.

Therefore, option (A) is the correct answer.