- 1(current)
Q. No.In an AC sub-circuit, the resistance \(R=0.2~\Omega\). At a certain instant \((V_{A}-V_{B})=0.5~\text{V}\), \(I=0.5~\text{A}\), and current is increasing at the rate of \(\left({\Delta I/\Delta t}\right)=8~\text{A/s}\). The inductance of the coil is:
| 1. | \(0.01~\text{H}\) | 2. | \(0.02~\text{H}\) |
| 3. | \(0.05~\text{H}\) | 4. | \(0.5~\text{H}\) |
Subtopic: Â LR circuit |
 84%
From NCERT
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In a part of the circuit, as shown, it is given that the current is decreasing at a rate of \(1~\text{A/s}\). Then \(V_A-V_B\) is equal to:
| 1. | \(18~\text{V}\) | 2. | \(-18~\text{V}\) |
| 3. | \(9~\text{V}\) | 4. | \(-9~\text{V}\) |
Subtopic: Â LR circuit |
 80%
From NCERT
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An ideal inductor-resistor-battery circuit is switched on at \(t=0~\text{s}\). At time \(t\), the current is \(i=i_0\left(1-e^{\left(-\frac{t}{\tau}\right)}\right)\text{A}\), where \(i_0\) is the steady-state value. The time at which the current becomes \(0.5i_0\) is: [Given \(\text{ln}(2)= 0.693\)]
1. \(6.93 \times 10^3 ~\text{s}\)
2. \(6.93~\text{ms}\)
3. \(69.3~\text{s}\)
4. \(6.93~\text{s}\)
Subtopic: Â LR circuit |
 60%
From NCERT
NEET - 2024
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An inductor \((L)\) and a resistor \((R)\) are connected in series across a battery of emf \(\varepsilon\), and the circuit is switched on. The current rises steadily. The rate of increase of the current (i.e. \(\left(\dfrac {di} {dt}\right) \)), when the voltage drop across the resistor is \(\dfrac \varepsilon 2\), is given by: \(\dfrac {di} {dt}\) =
| 1. | \(\dfrac \varepsilon L\) | 2. | \(\dfrac \varepsilon {2L}\) |
| 3. | \(\dfrac {2\varepsilon} L\) | 4. | \({\dfrac \varepsilon L}e^{-1}\) |
Subtopic: Â LR circuit |
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From NCERT
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The current in the branch of a circuit shown below increases at a rate of \(3\) A/s. At the instant when the current in the wire is \(2\) A, the potential drop from \(a\) to \(b\) is:
| 1. | \(26\) V | 2. | \(14\) V |
| 3. | \(16\) V | 4. | \(6\) V |
Subtopic: Â LR circuit |
 67%
From NCERT
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
- 1(current)
Q. No.
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