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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
When the switch $S$ is closed in the figure given below, the pointer of the galvanometer moves to the right. If $S$ is kept closed, will the pointer :
  • ✓
    Return to zero?
  • B
    Stay over on the right?
  • C
    Move to the left and stay there.
  • D
    Move to and fro until $S$ is opened.
✓

Answer

Correct option: A.
Return to zero?
After some time, the magnetic field gets constant; this means that there is no relative change in the value of magnetic field. Therefore, the circuit will have zero induced current.

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