Physics (AS & A Level) · May / June 2020 · Paper 13 · Question 22

A wave of amplitude $A$ has an intensity $I$. After passing through a certain medium, the wave has a new intensity of $\frac{I}{4}$. What is the new amplitude of the wave?

1. A$2A$
2. B$\frac{A}{2}$
3. C$\frac{A}{4}$
4. D$\frac{A}{16}$

As printed in the paper