Physics-
General
Easy
Question
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
- Constant deflection will be observed in the galvanometer for 50 Hz supply
- Visible small variations will be observed in the galvanometer for 50 Hz input
- Oscillations in the galvanometer may be observed when the input ac voltage has a frequency of 1 to 2 Hz
- No variation will be observed in the galvanometer even when the input ac voltage is 1 or 2 Hz
The correct answer is: Oscillations in the galvanometer may be observed when the input ac voltage has a frequency of 1 to 2 Hz
At low frequency of 1 to 2 Hz, oscillations may be observed as our eyes will be able to detect it.
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