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 2018
MCQ (Single Correct Answer)
+1
-0.33

A metal wire has a resistance of $$35 \Omega$$. If its length is increased to double by drawing it, then its new resistance will be

A
$$70 \Omega$$
B
$$140 \Omega$$
C
$$105 \Omega$$
D
$$35 \Omega$$
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

In the circuit in the figure, if no current flows through the galvanometer when the key K is closed, the bridge is balanced. The balancing condition for bridge is

AIIMS 2018 Physics - Current Electricity Question 10 English

A
$$\frac{C_1}{C_2}=\frac{R_1}{R_2}$$
B
$$\frac{C_1}{C_2}=\frac{R_2}{R_1}$$
C
$$\frac{C_1^2}{C_2^2}=\frac{R_1^2}{R_2^2}$$
D
$$\frac{C_1^2}{C_2^2}=\frac{R_2}{R_1}$$
4
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

In the circuit, shown the galvanometer $$G$$ of resistance $$60 \Omega$$ is shunted by a resistance $$r=0.02 \Omega$$. The current through $$R$$ is nearly $$1 \mathrm{~A}$$. The value of resistance $$R$$ (in ohm) is nearly

AIIMS 2018 Physics - Current Electricity Question 7 English

A
1.00 $$\Omega$$
B
5.00 $$\Omega$$
C
11.0 $$\Omega$$
D
6.0 $$\Omega$$
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