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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