NDA 2024 Physics question
An incandescent electric bulb converts 20% of its power consumption into light, and the remaining power is dissipated as heat. The bulb's filament has a resistance of 200 Ω and 2 A current flows through it. If the bulb remains ON for 10 h and the rate of electricity charge is ₹5/unit, then which among the following is the correct amount for the money spent on producing light ?
Answer: (D)
Solution
Power . Energy in 10 h $= 0.8\ kW × 10\ h =
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