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:
(a) Both A and R are true, and R is correct explanation of the assertion.
(b) Both A and R are true, but R is not the correct explanation of the assertion.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion: No net force acts on a rectangular coil carrying a steady current when suspended freely in a uniform magnetic field.
Reason: Forces acting on each pair of the opposite sides of the coil are equal and opposite.
(a) Both A and R are true, and R is correct explanation of the assertion.
Explanation:
In a rectangular coil carrying a steady current, the direction of current in opposite sides of coil is opposite to each other, therefore, forces acting on each pair of the opposite sides of the coil are equal and opposite, i.e., net force on the coil is equal to zero.