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A rectangular loop of sides 10 cm and 5 cm carrying a current I of 12 A is placed in different orientation as shown in the figures below : (a) B x y z I I I I (b) B x y z I I I I (c) B x y z I I I I (d) B x y z I I I I If there is a uniform magnetic field of 0.3 T in the positive z direction, in which orientations the loop would be in (i) stable equilibrium and (ii) unstable equilibrium ?

1. (a) and (b), respectively
2. (a) and (c), respectively
3. (b) and (d), respectively
4. (b) and (c), respectively

Correct answer: (b) and (d), respectively

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