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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
Question
For two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
  1. Both A and R are true, and R is correct explanation of the assertion.
  2. Both A and R are true, but R is not the correct explanation of the assertion.
  3. A is true, but R is false.
  4. A is false, but R is true.
Assertion: A moving coil galvanometer is based on magnetic effect of current.
Reason: On heating, the coil starts to rotate in direction of moving coil galvanometer.
✓

Answer

  1. A is true, but R is false.

Explanation:

A moving coil galvanometer is based on magnetic effect of current. A force acts on every side of the coil due to magnetic field when current is passed through the coil. Due to these forces, a couple is exerted on the coil.

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