Physics · Oct / Nov 2023 · Paper 12 · Question 35

The output of an a.c. generator is connected to a lamp. The coil of the generator is rotated at a constant rate which makes the lamp flash twice every second. The coil is then rotated at half the rate of rotation. What happens to the maximum brightness of the lamp and how many times does the lamp flash every second?

1. Adecreases, 1
2. Bdecreases, 4
3. Cdoes not change, 1
4. Ddoes not change, 4

As printed in the paper