1
IIT-JEE 2012 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2

A current carrying infinitely long wire is kept along the diameter of a circular wire loop, without touching it, the correct statement(s) is(are)

A
the emf induced in the loop is zero if the current is constant.
B
the emf induced in the loop is finite if the current is constant.
C
the emf induced in the loop is zero if the current decreases at a steady state
D
the emf induced in the loop is infinite if the current decreases at a steady state.
2
IIT-JEE 2009 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2

Two metallic rings A and B, identical in shape and size but having different resistivities $$\rho_A$$ and $$\rho_B$$, are kept on top of two identical solenoids as shown in the figure below. When current I is switched on in both the solenoids in identical manner, the rings A and B jump to heights $$h_A$$ and $$h_B$$, respectively, with $$h_A > h_B$$. The possible relation(s) between their resistivities and their masses $$m_A$$ and $$m_B$$ is (are) A
$$\rho_A$$ > $$\rho_B$$ and $$m_A$$ = $$m_B$$
B
$$\rho_A$$ < $$\rho_B$$ and $$m_A$$ = $$m_B$$
C
$$\rho_A$$ > $$\rho_B$$ and $$m_A$$ > $$m_B$$
D
$$\rho_A$$ < $$\rho_B$$ and $$m_A$$ < $$m_B$$
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