Question

When a magnet is pushed in and out of a circular coil $C$ connected to a very sensitive galvanometer $G$ as shown in the adjoining diagram with a frequency $v$, then

• A. Constant deflection is observed in the galvanometer
• B. Visible small oscillations will be observed in the galvanometer if $v$ is about $50\text{Hz}$
• C. Oscillations in the deflection will be observed clearly if $v=1$ or $2\text{Hz}$
• D. No variation in the deflection will be seen if $v=1$ or $2\text{Hz}$

Answer 1

The correct option is C Oscillations in the deflection will be observed clearly if $v=1$ or $2\text{Hz}$

When the frequency is high, the galvanometer will not show any deflection.