Question
Question: The diagram below shows two coils A and B placed parallel to each other at a very small distance. Co...
The diagram below shows two coils A and B placed parallel to each other at a very small distance. Coil A is connected to an ac supply. G is a very sensitive galvanometer. When the key is closed
A
Constant deflection will be observed in the galvanometer for 50 Hz supply
B
Visible small variations will be observed in the galvanometer for 50 Hz input
C
Oscillations in the galvanometer may be observed when the input ac voltage has a frequency of 1 to 2 Hz
D
No variation will be observed in the galvanometer even when the input ac voltage is 1 or 2 Hz
Answer
Oscillations in the galvanometer may be observed when the input ac voltage has a frequency of 1 to 2 Hz
Explanation
Solution
At low frequency of 1 to 2 Hz, oscillations may be observed as our eyes will be able to detect it.