# Two coils have a mutual inductance $$0.005$$ H. The current changes in the first coil according to equation $$I=I_{0}sin\omega t$$ where $$I_{0}=2$$ A and $$\omega=100\pi$$ rad/s. The maximum value of emf in the second coil is: 1. $$4\pi$$ V 2. $$3\pi$$ V 3. $$2\pi$$ V 4. $$\pi$$ V

Subtopic:  Mutual Inductance |
72%
From NCERT
AIPMT - 1998
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

As a result of a change in the magnetic flux linked to the closed-loop shown in the figure, an e.m.f., V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is:

1. QV

2. QV/2

3. 2QV

4. zero

Subtopic:  Faraday's Law & Lenz Law |
From NCERT
AIPMT - 2005
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

Initially plane of a coil is parallel to the uniform magnetic field B. If in time ∆t the coil is perpendicular to the magnetic field, then charge flows in ∆t depends on this time as:

1. $\propto$ $∆t$

2. $\propto$ $\frac{1}{∆t}$

3. $\propto$ ${\left(∆t\right)}^{0}$

4. $\propto$ ${\left(∆t\right)}^{2}$

Subtopic:  Motional emf |
76%
From NCERT
AIPMT - 1999
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

For an inductor coil, $$L = 0.04 ~\text{H}$$, the work done by a source to establish a current of $$5~\text{A}$$ in it is:
1.  $$0.5~\text{J}$$
2.  $$1.00~\text{J}$$
3.  $$100~\text{J}$$
4.  $$20~\text{J}$$

Subtopic:  Self - Inductance |
From NCERT
AIPMT - 1999
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 magnetic flux through a circuit of resistance R changes by an amount $∆\varphi$ in a time ∆t. Then the total quantity of electric charge Q that passes any point in the circuit during the time ∆t is represented by:

1. $\mathrm{Q}=\frac{\mathrm{\Delta }\varphi }{\mathrm{R}}$

2. $\mathrm{Q}=\frac{\mathrm{\Delta }\varphi }{\mathrm{\Delta t}}$

3. $\mathrm{Q}=\mathrm{R}\cdot \frac{\mathrm{\Delta }\varphi }{\mathrm{\Delta t}}$

4. $\mathrm{Q}=\frac{1}{\mathrm{R}}\cdot \frac{\mathrm{\Delta }\varphi }{\mathrm{\Delta t}}$

Subtopic:  Faraday's Law & Lenz Law |
82%
From NCERT
AIPMT - 2004
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

For a coil having$$L=2~\mathrm{mh},$$ the current flow through it is $$I=t^2e^{-t}.$$ The time at which emf becomes zero is:
1. 2 s
2. 1 s
3. 4 s
4. 3 s

Subtopic:  Self - Inductance |
61%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints