# Drift velocity $$v_d$$ varies with the intensity of electric field as per the relation: 1. $$v_{d} \propto E$$ 2. $$v_{d} \propto \frac{1}{E}$$ 3. $$v_{d}= \text{constant}$$ 4. $$v_{d} \propto E^2$$

Subtopic:  Current & Current Density |
78%
From NCERT
PMT - 1981
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If a metallic block has no potential difference applied across it, then the mean velocity of free electron is:
($$T$$= absolute temperature of the block)
 1 proportional to $$T$$. 2 proportional to$$\sqrt{T}$$ 3 zero. 4 finite but independent of temperature.
Subtopic:  Current & Current Density |
52%
From NCERT
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A wire of resistance $$R$$ is divided into $$10$$ equal parts. These parts are connected in parallel, the equivalent resistance of such connection will be:
1. $$0.01R$$
2. $$0.1R$$
3. $$10R$$
4. $$100R$$

Subtopic:  Combination of Resistors |
63%
From NCERT
PMT - 1973
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In the figure, the value of resistors to be connected between $$C$$ and $$D$$ so that the resistance of the entire circuit between $$A$$ and $$B$$ does not change with the number of elementary sets used is:

1. $$R$$
2. $$R(\sqrt{3}-1)$$
3. $$3R$$
4. $$R(\sqrt{3}+1)$$

Subtopic:  Combination of Resistors |
56%
From NCERT
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A battery of emf $$10$$ V is connected to resistance as shown in the figure below. The potential difference $$V_{A} - V_{B}$$
between the points $$A$$ and $$B$$ is:

1. $$-2$$ V

2. $$2$$ V

3. $$5$$ V

4. $$\frac{20}{11}~\text{V}$$

Subtopic:  Kirchoff's Voltage Law |
67%
From NCERT
PMT - 1994
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What is the equivalent resistance of the circuit​​​​​?

1. $$6~\Omega$$
2. $$7~\Omega$$
3. $$8~\Omega$$
4. $$9~\Omega$$

Subtopic:  Combination of Resistors |
70%
From NCERT
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If each resistance in the figure is $$9~\Omega$$, then the reading of the ammeter is:

1. $$5~\text{A}$$
2. $$8~\text{A}$$
3. $$2~\text{A}$$
4. $$9~\text{A}$$

Subtopic:  Combination of Resistors |
60%
From NCERT
PMT - 2000
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Equivalent resistance across terminals $$A$$ and $$B$$ will be:

1. $$1~\Omega$$
2. $$2~\Omega$$
3. $$3~\Omega$$
4. $$4~\Omega$$

Subtopic:  Combination of Resistors |
71%
From NCERT
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The total current supplied to the circuit by the battery is:

1. $$1~\text{A}$$
2. $$2~\text{A}$$
3. $$4~\text{A}$$
4. $$6~\text{A}$$

Subtopic:  Combination of Resistors |
65%
From NCERT
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In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to $$3$$ volt. The voltage across the resistance $$R_4$$ is:

1. $$0.4$$ V

2. $$0.6$$ V

3. $$1.2$$ V

4. $$1.5$$ V

Subtopic:  Kirchoff's Voltage Law |
59%
From NCERT
PMT - 2004
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