Select Chapter Topics: 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 |
70%
From NCERT
AIPMT - 1998
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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 |
74%
From NCERT
AIPMT - 1999
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For an inductor coil, L = 0.04 H, the work done by a source to establish a current of 5 A in it is:

1.  0.5 J
2.  1.00 J
3.  100 J
4.  20 J  Subtopic:  Self - Inductance |
From NCERT
AIPMT - 1999
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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
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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 |
80%
From NCERT
AIPMT - 2004
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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
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