Match List I with List II.
$$\begin{array}{|l|l|l|l|}\hline & \text{List I} & & \text{List II} \\ \hline \text{A.} & \text{AC generator} & \text{I.} & \text{Detects the presence of current in the circuit} \\ \hline \text{B.} & \text{Galvanometer} & \text{II.} & \text{Converts mechanical energy into electrical energy} \\ \hline \text{C.} & \text{Transformer} & \text{III.} & \text{Works on the principle of resonance in AC circuit} \\ \hline \text{D.} & \text{Metal detector} & \text{IV.} & \text{Changes an alternating voltage for smaller or greater value} \\ \hline \end{array}$$
Choose the correct answer from the options given below:
Answer: (A) A-II, B-I, C-IV, D-III
An AC generator converts mechanical energy into electrical energy (A-II). A galvanometer detects current (B-I). A transformer steps an alternating voltage up or down (C-IV). A metal detector uses resonance in an AC circuit (D-III).
Solution by Sreeraj P, M.Sc Physics