CSEC Physics · May/June 2009 · Paper 2 · Question 5(b)(iii)

An emergency flashlight (Figure 4) has a crank handle connected to an alternating current generator, rechargeable batteries, and LEDs. Turning the handle rotates a permanent magnet in the presence of a stationary coil, producing current to charge the batteries.

At a reasonable cranking rate, the unit generates 6.2 V. Calculate the current in the circuit if the resistance is 310 Ω.

This question uses a figure or table from the paper — you'll see it when you practise.