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Q. No.The quantity represented by the drift velocity per unit electric field is:
1.
potential
2.
resistivity
3.
current
4.
mobility
Subtopic: Current & Current Density |
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Level 1: 80%+
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In the circuit shown, the current \(I_1\) and \(I_2\) are, respectively:
1. \(4~\text{A};~4~\text{A}\)
2. \(2~\text{A};~6~\text{A}\)
3. \(6~\text{A};~2~\text{A}\)
4. \(5~\text{A};~3~\text{A}\)
1. \(4~\text{A};~4~\text{A}\)
2. \(2~\text{A};~6~\text{A}\)
3. \(6~\text{A};~2~\text{A}\)
4. \(5~\text{A};~3~\text{A}\)
Subtopic: Combination of Resistors |
82%
Level 1: 80%+
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A resistor with resistance \(R\) produces \(440~\text{J}\) of thermal energy in \(22~\text{s}\) when a current of \(2~\text{A}\) flows through it. When the current is increased to \(5~\text{A},\) the thermal energy generated in the same duration is:
1. \(1.80\) kJ
2. \(2.20\) kJ
3. \(2.75\) kJ
4. \(3.2\) kJ
1. \(1.80\) kJ
2. \(2.20\) kJ
3. \(2.75\) kJ
4. \(3.2\) kJ
Subtopic: Heating Effects of Current |
85%
Level 1: 80%+
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The equivalent resistance between points \(A\) and \(B\) in the given network is:
1. \(65~\Omega\)
2. \(20~\Omega\)
3. \(5~\Omega\)
4. \(2~\Omega\)
1. \(65~\Omega\)
2. \(20~\Omega\)
3. \(5~\Omega\)
4. \(2~\Omega\)
Subtopic: Combination of Resistors |
82%
Level 1: 80%+
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An aluminium wire is stretched to make its length, \(0.4\%\) larger. Then, the percentage change in resistance is:
1. \(0.4\%\)
2. \(0.2\%\)
3. \(0.8\%\)
4. \(0.6\%\)
1. \(0.4\%\)
2. \(0.2\%\)
3. \(0.8\%\)
4. \(0.6\%\)
Subtopic: Derivation of Ohm's Law |
72%
Level 2: 60%+
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A cell has emf of \(2.2~\text V\) and its internal resistance is \(0.1~\Omega.\) What is the current in the circuit, if the cell is connected across a resistance of \(1~\Omega?\)
1. \(1~\text A \)
2. \(1.5~\text A \)
3. \(2.0~\text A \)
4. \(2.5~\text A \)
1. \(1~\text A \)
2. \(1.5~\text A \)
3. \(2.0~\text A \)
4. \(2.5~\text A \)
Subtopic: Grouping of Cells |
89%
Level 1: 80%+
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In a meter bridge experiment (as shown in the figure), the balance point is found to be \(40~\text{cm}\) from end \(A,\) given that resistance \(Y\) is \(12.0~\Omega.\) What is the value of the resistance \(X?\)
1. \(4~\Omega\)
2. \(8~\Omega\)
3. \(10~\Omega\)
4. \(14~\Omega\)
1. \(4~\Omega\)
2. \(8~\Omega\)
3. \(10~\Omega\)
4. \(14~\Omega\)
Subtopic: Meter Bridge |
91%
Level 1: 80%+
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A resistor develops \(300~\text{J}\) of thermal energy in \(15~\text{s}\) when a current of \(2~\text{A}\) is passed through it. If the current increases to \(3~\text{A}\), the energy developed in \(10~\text{s}\) is:
1. \(150~\text{J}\)
2. \(250~\text{J}\)
3. \(350~\text{J}\)
4. \(450~\text{J}\)
1. \(150~\text{J}\)
2. \(250~\text{J}\)
3. \(350~\text{J}\)
4. \(450~\text{J}\)
Subtopic: Heating Effects of Current |
85%
Level 1: 80%+
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The effective resistance of a number of identical resistors connected in parallel is \(x.\) When one of the resistors is removed, the effective resistance becomes \(y.\) What is the resistance of the removed resistor?
| 1. | \(\dfrac{(x/y)}{(x+y)}\) | 2. | \(\dfrac{(xy)}{(y-x)}\) |
| 3. | \( (y-x)\) | 4. | \(\sqrt{xy}\) |
Subtopic: Combination of Resistors |
75%
Level 2: 60%+
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What will be the most suitable combination of three resistors \(A=2~\Omega, B= 4~\Omega, C= 6~\Omega\) so that \(\left({22 \over 3}\right)\Omega\) is the equivalent resistance of combination?
| 1. | Parallel combination of \(A\) and \(C\) connected in series with \(B\). |
| 2. | Parallel combination of \(A\) and \(B\) connected in series with \(C\). |
| 3. | Series combination of \(A\) and \(C\) connected in parallel with \(B\). |
| 4. | Series combination of \(B\) and \(C\) connected in parallel with \(A\). |
Subtopic: Combination of Resistors |
87%
Level 1: 80%+
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