Question

(iv) Bulb glows only in
(a) closed circuit
(b) open circuit
(c) in both circuits
(d) open circuit if bulb is not fused

Answer 1

Answer:

option A open circuit

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Answer 2

The bulb glows only in a closed circuit. (Option a)

• In a complete circuit, the bulb glows because the current is flowing. A bulb requires proper current flow in order to glow.
• Once the current moves, the bulb's filament starts heating up and glowing which then emits heat and light.
• However, if the loop is open, it will not let the current move in the loop and so, the bulb will stop glowing too.