Subject :NSO Class : Class 6
Which of the following are possible sets of polarity when magnetising a steel bar PQ by the stroking method? (For magnets, N indicates north pole and S indicates south pole)
(i) 1 = N, 2 = S, P = N, Q = S
(ii) 1 = N, 2 = S, P = S, Q = N
(iii) 1 = S, 2 = N, P = S, Q = N
(iv) 1 = S, 2 = N, P = N, Q = S
A(i) and (ii) only
B(iii) and (iv) only
C(i) and (iii) only
D(ii) and (iv) only
Either b or d which one should i give very confusing???
Ans 1:
Class : Class 7
D
Ans 2:
Class : Class 7
Deeeeeeeeeeeeeeeeeeee