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PHYSICS CH5 Magnetism and Electromagnetism — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9SciencePHYSICS CH5 Magnetism and Electromagnetism1 Mark
MCQ
Assertion (A): When 2 long parallel wires, hanging freely are connected in parallel to a battery, they come closer to each other.
Reason (R): Wires carrying current in opposite direction repel each other.
  • A
    If both assertion and reason are true and the reason is the correct explanation of assertion.
  • ✓
    If both assertion and reason are true but the reason is not the correct explanation of assertion.
  • C
    If the assertion is true but the reason is false.
  • D
    If the assertion is false but the reason is true
✓

Answer

Correct option: B.
If both assertion and reason are true but the reason is not the correct explanation of assertion.
(b) Both assertion and reason are true but the reason is not the correct explanation of the assertion
Reason: The wires are parallel to each other but the direction of current in it is in the same direction, so they attract each other. If the current in the wire is in opposite direction then wires repel each other.

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