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
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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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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.  t

2.  1t

3.  (t)0

4.  (t)2

Subtopic:  Motional emf |
 76%
From NCERT
AIPMT - 1999
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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
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The magnetic flux through a circuit of resistance R changes by an amount ϕ 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. Q=ΔϕR

2. Q=ΔϕΔt

3. Q=RΔϕΔt

4. Q=1RΔϕΔt

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