(a) The potential difference applied across a given resistor is altered so that the heat produced
Channel: Doubtnut
Date: 03/01/2020

(a) The potential difference applied across a given resistor is altered so that the heat produced per secound increases by a factor of 9 . By what factor does the appliced potential difference change ? (b) In the figure shown, an ammeter A and a resistor of 4 `Omega` are connected to the terminals of the socrce . The emf of the source is 12 V having an internal resisitance of 2 `Omega` Calculate the voltmeter and ammeter readings.