In the figure magnetic energy stored in the coil is:

 1 Zero 2 Infinite 3 $$25$$ joules 4 None of the above
Subtopic: Â LR circuit |
Â 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A solenoid of inductance $$L$$ and resistance $$R$$ is connected to a battery of emf $$E$$. Maximum value of magnetic energy stored in the inductor is:
 1 $$\dfrac{E^{2}}{2 R}$$ 2 $$\dfrac{E^{2} L}{2 R^{2}}$$ 3 $$\dfrac{E^{2} L}{R}$$  4 $$\dfrac{E^{2} L}{2 R}$$
Subtopic: Â LR circuit |
Â 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

When the current in the portion of the circuit shown in the figure is $$2$$ A and increases at the rate of $$1$$ A/s, the measured potential difference $$V_{ab}=8$$ V. However, when the current is $$2$$ A and decreases at the rate of $$1$$ A/s, the measured potential difference $$V_{ab}= 4$$ V. The value of $$R$$ and $$L$$ is:

 1 $$3~\Omega$$ and $$2~\text{H}$$ respectively 2 $$3~\Omega$$ and $$3~\text{H}$$ respectively 3 $$2~\Omega$$ and $$1~\text{H}$$ respectively 4 $$3~\Omega$$ and $$1~\text{H}$$ respectively
Subtopic: Â LR circuit |
Â 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The figure shows three circuits with identical batteries, inductors, and resistors. Rank the circuits according to the current, in descending order, through the battery $$(i)$$ just after the switch is closed and $$(ii)$$ a long time later:

 1 $$(i)~ i_2>i_3>i_1\left(i_1=0\right) (ii) ~i_2>i_3>i_1$$ 2 $$(i)~ i_2i_3>i_1$$ 3 $$(i) ~i_2=i_3=i_1\left(i_1=0\right) (ii)~ i_2i_1\left(i_1 \neq 0\right) (ii) ~i_2>i_3>i_1$$
Subtopic: Â LR circuit |
Â 71%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The network shown in figure is a part of a complete circuit. If at a certain instant, the current $$i$$ is $$10$$ A and is increasing at the rate of $$4\times 10^{3}$$ A/sec, then $$V_A-V_B$$ is:

 1 $$6$$ V 2 $$-6$$ V 3 $$10$$ V 4 $$-10$$ V
Subtopic: Â LR circuit |
Â 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In the circuit diagram shown in figure, $$R = 10~\Omega$$, $$L = 5~\text{H},$$ $$E = 20~\text{V}$$ and $$i = 2~\text{A}$$. This current is decreasing at a rate of $$1.0$$ A/s$$V_{ab}$$ at this instant will be:

 1 $$40$$ V 2 $$35$$ V 3 $$30$$ V 4 $$45$$ V
Subtopic: Â LR circuit |
Â 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A series combination of inductance $$(L)$$ and resistance $$(R)$$ is connected to a battery of emf $$E$$. The final value of current depends on:
1. $$L$$ and $$R$$

2. $$E$$ and $$R$$

3. $$E$$ and $$L$$

4. $$E$$, $$L$$, and $$R$$

Subtopic: Â LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is $$10~\Omega.$$ The current in the circuit will be:

1. $$i = 0.5~\text{A}$$
2. $$i > 0.5~\text{A}$$
3. $$i < 0.5~\text{A}$$
4. $$i = 0$$

Subtopic: Â LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Switch $$S$$ of the circuit shown in the figure is closed at $$t=0$$. If $$e$$ denotes the induced emf in $$L$$ and $$i$$ denotes the current flowing through the circuit at time $$t$$, then which of the following graphs is correct?

 1 2 3 4
Subtopic: Â LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

An inductor is connected to a direct voltage source through a switch. Then:

 1 a very large emf is induced in inductor when the switch is closed. 2 a large emf is induced when the switch is opened. 3 a large emf is induced whether the switch is closed or opened. 4 no emf is induced whether the switch is closed or opened.
Subtopic: Â LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints