Arrange the following steps in sequential order to demonstrate the magnetic effect of the elctric cur-rent using magnetic compass.
(A) Wind an insulated conducting wire around the magnetic compass such that the axis of the coil is directed along east west direction and con-nect the free ends of the wire to a cell through a switch.
(B) Take a magnetic compass.
(C ) When current flows through the conducting wire, it behaves as a magnet and deflects the compass needle.
(D) When the switch is closed, the magnetic nee-dle in the compass deflects from its initial posi-tion and when the switch is opend, the needle comes back to its initial position.

Options

A. BADC
B. CBAD
C. ACBD
D. ABCD

Answer

A

Explanation

(i) Take a magnetic compass, (ii) Wind an insulated conducting wire around the magnetic compass such that the axis of the coil is directed along east-west direction and connect the free ends of the wire to a cell through a switch.
(iii) When the switch is closed, the magnetic needle in the compass deflects from its initial position and when the switch is opened, the needle comes back to its initial position. (iv) When current flows through the conducting wire, it behaves as a magnet and deflects the compass needle.