The instant at which a bulb is switched on, it's power is maximum,then it decreases to a steady value .Explain
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Answer: Inductor in the bulb.
The bulb has filament that is a coil of tungsten wire. It glows as it heats up. Power is given as:
So, the voltage and current drawn initially is large and as it heats up its resistance increases and current decreases as voltage is constant. SO, power is maximum initially.
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Answer:
EXPLANATION
Explanation:
The bulb has filament that is a coil of tungsten wire. It glows as it heats up. Power is given as: P=VI
So, the voltage and current drawn initially is large and as it heats up its resistance increases and current decreases as voltage is constant. SO, power is maximum initially
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