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Question 33: A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. What p.d. is needed to make a current of 250 mA flow through the same wire ? Lakhmir Singh Physics Class 10

Answer»

125VExplanation:Since by the HELP of Ohm's law we can CONCLUDE that V=IRso 10V and 0.02 A gives 500 ohm resistance250 mA and 500ohm will give 125 VV=250/1000*500=1/4*500=125V



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