2020 CAIE AS & A level October November Physics Paper 12 Q N 34 (9702/12/O/N/20) by Sajit C Shakya

2020 CAIE AS & A level October November Physics Paper 12 Q. No. 34 (9702/12/O/N/20) by Sajit Chandra Shakya from Nepal Chapter - CURRENT ELECTRICITY In the circuit shown, a fixed resistor X is connected in series with a battery and a variable resistor. The power dissipated in resistor X is 7.2 W when a current of 3.0 A passes through it. The variable resistor is adjusted so that the power dissipated in X increases by 50%. What is the new current in the circuit? A 2.4 A B 3.7 A C 4.5 A D 14 A