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Q. No.The amount of charge \(Q\) passed in time \(t\) through a cross-section of a wire is \(Q=(7t^{2}+4t+1)~\text{C}.\) The value of current at time \(t= 6\) seconds is:
1. \( 38~ \text{A} \)
2. \( 27~ \text{A} \)
3. \( 104~ \text{A} \)
4. \( 88~ \text{A}\)
1. \( 38~ \text{A} \)
2. \( 27~ \text{A} \)
3. \( 104~ \text{A} \)
4. \( 88~ \text{A}\)
Subtopic: Current & Current Density |
92%
From NCERT
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The electric current through a wire varies with time as shown in the figure.
The total charge flown across any cross-section of the wire in the time interval \((0 \text-T)\) is:
The total charge flown across any cross-section of the wire in the time interval \((0 \text-T)\) is:
| 1. | \( {i}_{0}T\) | 2. | \( \dfrac{{i}_{0}T}{2}\) |
| 3. | \( \dfrac{{i}_{0}T}{3}\) | 4. | \( \dfrac{{i}_{0}T}{\sqrt{2}}\) |
Subtopic: Current & Current Density |
72%
From NCERT
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The current in a simple series circuit is \(5.0\) A. When an additional resistance of \(2.0\) \(\Omega\) is inserted, the current decreases to \(4.0\) A. The original resistance of the circuit was:
1. \(1.25\) \(\Omega\)
2. \(8\) \(\Omega\)
3. \(10\) \(\Omega\)
4. \(20\) \(\Omega\)
Subtopic: Combination of Resistors |
82%
From NCERT
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\(10\) resistors, each of resistance \(R\) are connected in series to a battery of \(E\) and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased \(n\) times. The value of \(n\) is:
1. \(1000\)
2. \(10\)
3. \(100\)
4. \(1\)
1. \(1000\)
2. \(10\)
3. \(100\)
4. \(1\)
Subtopic: Combination of Resistors |
68%
From NCERT
NEET - 2023
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The magnitude and direction of the current in the following circuit is:
| 1. | \(1.5~\text{A}\) from \({B}\) to \({A}\) through \(E\) |
| 2. | \(0.2~\text{A}\) from \({B}\) to \({A}\) through \(E\) |
| 3. | \(0.5~\text{A}\) from \({A}\) to \({B}\) through \(E\) |
| 4. | \(\dfrac{5}{9}~\text{A}\) from \({A}\) to \({B}\) through \(E\) |
Subtopic: Kirchoff's Voltage Law |
74%
From NCERT
NEET - 2023
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Arrange the following in the order of their resistance.
Choose the correct answer from the options given below:
| A. | (\(0\) to \(1~\text A\)) ranged ammeter. |
| B. | (\(0\) to \(100~\text {mA}\)) ranged milli-ammeter. |
| C. | (\(0\) to \(500~\mu\text A\)) ranged micro-ammeter. |
| D. | (\(0\) to \(100~\text V\)) ranged voltmeter. |
Choose the correct answer from the options given below:
| 1. | \(\mathrm{A > B > C > D}\) | 2. | \(\mathrm{D > C > B > A}\) |
| 3. | \(\mathrm{D > A > B > C}\) | 4. | \(\mathrm{C > B > A > D}\) |
Subtopic: Derivation of Ohm's Law |
55%
From NCERT
NEET - 2024
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In an electrical circuit, the voltage is measured as \({V}=(200\pm4)\) volts and the current is measured as \({I}=(20\pm0.2)~\text A.\) The value of the resistance is:
1. \((10\pm4.2)~\Omega \)
2. \((10\pm0.3)~\Omega \)
3. \((10\pm0.1)~\Omega \)
4. \((10\pm0.8)~\Omega \)
1. \((10\pm4.2)~\Omega \)
2. \((10\pm0.3)~\Omega \)
3. \((10\pm0.1)~\Omega \)
4. \((10\pm0.8)~\Omega \)
Subtopic: Derivation of Ohm's Law |
From NCERT
NEET - 2024
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A wire of length \('l'\) and resistance \(100 ~\Omega\) is divided into \(10\) equal parts. The first \(5\) parts are connected in series while the next \(5\) parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:
| 1. | \(52~ \Omega\) | 2. | \(55~ \Omega\) |
| 3. | \(60 ~\Omega\) | 4. | \(26~ \Omega\) |
Subtopic: Combination of Resistors |
70%
From NCERT
NEET - 2024
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The steady-state current in the circuit shown below is:
1. \(0.67~\text A\)
2. \(1.5~\text A\)
3. \(2~\text A\)
4. \(1~\text A\)
1. \(0.67~\text A\)
2. \(1.5~\text A\)
3. \(2~\text A\)
4. \(1~\text A\)
Subtopic: Derivation of Ohm's Law |
73%
From NCERT
NEET - 2024
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A uniform wire of resistance \(50~\Omega\) \(\) is cut into \(5\) equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is:
| 1. | \(2~\Omega\) \(\) | 2. | \(10~\Omega\) \(\) |
| 3. | \(250~\Omega\) \(\) | 4. | \(6250~\Omega\) |
Subtopic: Derivation of Ohm's Law |
77%
From NCERT
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