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.