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Why are the connecting wires in a circuit made thick and short, while the element of a heater is made long and thin?
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An electric bulb is marked 100 W, 220 V. Calculate the current it draws and its resistance in normal use.
Original Khojo Papers practice question — not from a past board paper.
Answer
Current about 0.45 A and resistance 484 Ω
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
I = P ÷ V = 100 ÷ 220 ≈ 0.45 A, and R = V2 ÷ P = 48400 ÷ 100 = 484 Ω.
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