Physics (AS & A Level) · Oct / Nov 2022 · Paper 13 · Question 31

A battery with a constant internal resistance is connected to a resistor of resistance 250 Ω, as shown. The current in the resistor is 40 mA for a time of 60 s. During this time 6.0 J of energy is dissipated by the internal resistance. What is the energy supplied to the external resistor during the 60 s and the electromotive force (e.m.f.) of the battery?

1. Aenergy / J: 30, e.m.f. / V: 2.5
2. Benergy / J: 30, e.m.f. / V: 7.5
3. Cenergy / J: 24, e.m.f. / V: 10.0
4. Denergy / J: 24, e.m.f. / V: 12.5

As printed in the paper