question_answer

Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). Mark the correct choice as:

Assertion [A]: When two 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) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]

B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]

C) Assertion [A] is true but Reason (R) is false

D) Assertion [A] is false and Reason (R) is also false

Correct Answer: B

Solution :

[b] The wires are parallel to each other but the direction of current in it is in same direction so they attract each other. If the current in the wires is in opposite direction then wires repel each other. When the currents are in opposite directions, the magnetic forces are reversed and the wires repels each other.