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Q. No.For the given circuit diagram, find the current I.
1. \({{5}\over{16}}A\)
2. \({{5}\over{48}}A\)
3. \({{5}\over{12}}A\)
4. \({{1}\over{16}}A\)
Subtopic: Kirchoff's Voltage Law |
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Find the current flowing in \(3~ \Omega\) resistor in the given circuit
1. \(0.4 ~\text A\)
2. \(0.2 ~\text A\)
3. \(0.8 ~\text A\)
4. \(0.6 ~\text A\)
1. \(0.4 ~\text A\)
2. \(0.2 ~\text A\)
3. \(0.8 ~\text A\)
4. \(0.6 ~\text A\)
Subtopic: Kirchoff's Voltage Law |
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Two identical bulbs are first connected in series then in parallel. Find the ratio of power consumed in two cases:
1. \(1 : 1\)
2. \(1 : 4\)
3. \(4 : 1 \)
4. \(1 : 2\)
1. \(1 : 1\)
2. \(1 : 4\)
3. \(4 : 1 \)
4. \(1 : 2\)
Subtopic: Heating Effects of Current |
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JEE
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The length of a conductor having resistance \(160 ~\Omega\), is compressed to 25% of its initial value. The new resistance will be
1. \(10 ~\Omega\)
2. \(20 ~\Omega\)
3. \(15 ~\Omega\)
4. \(17 ~\Omega\)
1. \(10 ~\Omega\)
2. \(20 ~\Omega\)
3. \(15 ~\Omega\)
4. \(17 ~\Omega\)
Subtopic: Derivation of Ohm's Law |
JEE
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When an electric field is applied to the electrons in a conductor, it starts:
| 1. | moving in a straight line. |
| 2. | drifting from higher potential to lower potential. |
| 3. | drifting from lower potential to higher potential. |
| 4. | moving with constant velocity. |
Subtopic: Current & Current Density |
60%
From NCERT
JEE
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If the length of a conductor is increased by 20 percent and cross-sectional area is decreased by 4 percent, then calculate the percentage change in resistance of a conductor.
1. 27%
2. 25%
3. 20%
4. 16%
1. 27%
2. 25%
3. 20%
4. 16%
Subtopic: Derivation of Ohm's Law |
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The equivalent resistance of the following circuit (in ohms) is equal to \(\frac{x}{7}.\) What is the value of \(x?\)
| 1. | \(14\) | 2. | \(10\) |
| 3. | \(12\) | 4. | \(16\) |
Subtopic: Combination of Resistors |
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\(10\) resistors each of \(10\) \(\Omega\) resistance when connected together give minimum equivalent resistance \(R_1\) and maximum equivalent resistance \(R_2\) among various possible combinations.
So, \({R_2 \over R_1}\) is equal to:
1. \(1\)
2. \(100\)
3. \(200\)
4. \(10\)
So, \({R_2 \over R_1}\) is equal to:
1. \(1\)
2. \(100\)
3. \(200\)
4. \(10\)
Subtopic: Combination of Resistors |
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Find the equivalent resistance between points \(A\) and \(B\) in the given circuit.
1. \(6.4 ~\Omega\)
2. \(4 ~\Omega\)
3. \(3.2 ~\Omega\)
4. \(8 ~\Omega\)
1. \(6.4 ~\Omega\)
2. \(4 ~\Omega\)
3. \(3.2 ~\Omega\)
4. \(8 ~\Omega\)
Subtopic: Combination of Resistors |
82%
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Find the magnitude of potential difference in volt between A and B in given circuit.
1. 2 V
2. 0
3. 3 V
4. 6 V
1. 2 V
2. 0
3. 3 V
4. 6 V
Subtopic: Kirchoff's Voltage Law |
From NCERT
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