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CBSE Class 10 Science Question 19 of 45

Solved 2024 Sample Question Paper CBSE Class 10 Science — Question 19

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Question

Question 19

Assertion : A compass needle is placed near a current carrying wire. The deflection of the compass needle decreases when the magnitude of the current in the wire is increased.

Reason : The strength of a magnetic field at a point near the conductor increases on increasing the current.

  1. Both A and R are true, and R is the correct explanation of A.
  2. Both A and R are true, and R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

A is false but R is true.

Reason — A compass needle is placed near a current carrying wire. The deflection of the compass needle increases when the magnitude of the current in the wire is increased because strength of a magnetic field at a point near the conductor increases on increasing the current.