B) Salve any three from the following questions (6) 1) Abulb of 60 Wisconnected acro of 240V Find the resistance of the bulbs
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Answer : The Resistance of Bulb is 960ohms.
Explanation:
Power of Bulb ( P ) = 60W ( given )
Voltage of Bulb ( V ) = 240V ( given )
Resistance of Bulb ( R ) = ? ( To find )
According to the formula ,
P = V² / R
∴ R = V² / P
∴ R = (240)² / 60
∴ R = 57600 / 60
∴ R = 960ohm
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