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JEE Advanced 2020 Full Test 4 Paper 1

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Question : 12

Total: 54

Two identical circular coils M and N are arranged coaxially as shown in the figure. Separation between the coils is large as compared to their radii. The arrangement is viewed from left along the common axis. The sign convention adopted is that currents are taken to be positive when they appear to flow in clockwise direction. Then

if M carries a constant positive current and is moved towards N, a positive current is induced in N
if M carries a constant positive current and N is moved towards M, a negative current is induced in N
if a positive current in M is switched off, a positive current is momentarily induced in N
if both coils carry positive currents, they will attract each other

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