In the figure magnetic energy stored in the coil is:

 1 Zero 2 Infinite 3 25 joules 4 None of the above
Subtopic:  LR circuit |
84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A solenoid of inductance L and resistance R is connected to a battery of e.m.f. E. Maximum value of magnetic energy stored in the inductor is:

$1.$ $\frac{{E}^{2}}{2R}$
$2.$ $\frac{{E}^{2}L}{2{R}^{2}}$
$3.$ $\frac{{E}^{2}L}{R}$ 
$4.$ $\frac{{E}^{2}L}{2R}$

Subtopic:  LR circuit |
82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 Ω and 2 H respectively 2 3 Ω and 3 H respectively 3 2 Ω and 1 H respectively 4 3 Ω and 1 H respectively

Subtopic:  LR circuit |
71%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 $$(i) i_2=i_3=i_1\left(i_1=0\right)\left(\right. (ii) i_2i_1\left(i_1 \neq 0\right) (ii) i_2>i_3>i_1$$
Subtopic:  LR circuit |
71%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The key K is inserted at time t= 0. The initial (t=0) and final $\left(t\to \infty \right)$ currents through the battery are:

1. $$\frac{1}{15}~A,~\frac{1}{10}~A$$
2. $$\frac{1}{10}~A,~\frac{1}{15}~A$$
3. $$\frac{2}{15}~A,~\frac{1}{10}~A$$
4. $$\frac{1}{15}~A,~\frac{2}{25}~A$$

Subtopic:  LR circuit |
70%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

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 $4×{10}^{3}$ A/sec, then ${V}_{A}-{V}_{B}$ is:

 1 6 V 2 -6 V 3 10 V 4 -10 V
Subtopic:  LR circuit |
66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the circuit diagram shown in figure, R = 10 $$\Omega$$, L = 5 H, E = 20 V and i = 2 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:  LR circuit |
58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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:  LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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

1. i = 0.5 A

2. i > 0.5 A

3. i < 0.5 A

4. i = 0

Subtopic:  LR circuit |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints