Saturday, January 10, 2015

A lamp draws 0.5 A at 230 V. If the voltage is reduced to 115 V, will the current be halved ?

A  lamp draws 0.5 A at 230 V. If the voltage is reduced to 115 V, will the current be halved ?



No.because ohms law is true for constantant temperature.If the voltage is reduced from 230 to 115 volt,results in decrease in resistance. Consequently ohms law cannot be applied.

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