1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

A current of $$10 \mathrm{~A}$$ is passing through a metallic wire of cross-sectional area $$4 \times 10^{-6} \mathrm{~m}^2$$. If the density of the aluminium conductor is $$2.7 \mathrm{~gm} / \mathrm{cc}$$ considering aluminium gives 1 electron per atom for conduction, then find the drift velocity of the electrons if molecular weight of aluminium is $$27 \mathrm{~gm}$$.

A
$$1.6 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
B
$$3.6 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
C
$$2.6 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
D
$$1.5 \times 10^{-4} \mathrm{~m} / \mathrm{s}$$
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Assertion : A metallic surface is moved in and out in magnetic field then emf is induced in it.

Reason : Eddy current will be produced in a metallic surface moving in and out of magnetic field.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true, but reason is not the correct explanation of assertion.
C
If assertion is true, but reason is false.
D
If both assertion and reason are false.
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Assertion : There is no loss in energy in elastic collision.

Reason : Linear momentum is conserved in elastic collision.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true, but reason is not the correct explanation of assertion.
C
If assertion is true, but reason is false.
D
If both assertion and reason are false.
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Assertion : Paramagnetic substances get poorly attracted in magnetic field.

Reason : Because magnetic dipoles are aligned along external magnetic field weakly.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true, but reason is not the correct explanation of assertion.
C
If assertion is true, but reason is false.
D
If both assertion and reason are false.
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