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Q. No.A square loop with a side length of 1 m and resistance of 1 Ω is placed in a uniform magnetic field of 0.5 T. The plane of the loop is perpendicular to the direction of the magnetic field. The magnetic flux through the loop is:
1. zero
2. 2 Wb
3. 0.5 Wb
4. 1 Wb
1. zero
2. 2 Wb
3. 0.5 Wb
4. 1 Wb
Subtopic: Magnetic Flux |
69%
From NCERT
NEET - 2022
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In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it is shown in the figure as a function of time. The magnitude of change in flux through the coil in Weber is:
1. 2
2. 6
3. 4
4. 8
Subtopic: Magnetic Flux |
69%
From NCERT
AIPMT - 2012
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A coil of resistance 400 Ω is placed in a magnetic field. The magnetic flux ϕ (Wb) linked with the coil varies with time t (s) as ϕ=50t2+4. The current in the coil at t=2 s is:
1. 0.5 A
2. 0.1 A
3. 2 A
4. 1 A
Subtopic: Faraday's Law & Lenz Law |
89%
From NCERT
AIPMT - 2012
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A circular loop of radius R, enters a region of uniform magnetic field B as shown in the diagram. The field (B) is perpendicular to the plane of the loop while the velocity of the loop, v is along its plane. The induced EMF:
| 1. | increases continuously. |
| 2. | decreases continuously. |
| 3. | first increases and then decreases. |
| 4. | remains constant throughout. |
Subtopic: Faraday's Law & Lenz Law |
69%
From NCERT
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A big circular coil with 1000 turns and an average radius of 10 m is rotating about its horizontal diameter at a rate of 2 rad s−1. The vertical component of the Earth's magnetic field at that location is 2×10−5 T, and the electrical resistance of the coil is 12.56 Ω, the maximum induced current in the coil will be:
1. 2 A
2. 0.25 A
3. 1.5 A
4. 1 A
1. 2 A
2. 0.25 A
3. 1.5 A
4. 1 A
Subtopic: Faraday's Law & Lenz Law |
58%
From NCERT
NEET - 2022
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The magnetic field, through a closed loop of conducting wire covering an area of 100 cm2, is 5×10−2 T and it is uniform and normal to the area. If the field is switched off in a time of 10 ms, the average EMF induced is:
| 1. | 5 V | 2. | 0.5 V |
| 3. | 0.05 V | 4. | 5×10−4 V |
Subtopic: Faraday's Law & Lenz Law |
78%
From NCERT
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The figure shows planar loops of different shapes moving out of or into a region of a magnetic field which is directed normally to the plane of the loop away from the reader. Then:
| 1. | for the rectangular loop abcd, the induced current is clockwise. |
| 2. | for the triangular loop abc, the induced current is clockwise. |
| 3. | for the irregularly shaped loop abcd, the induced current is anti-clockwise. |
| 4. | none of these. |
Subtopic: Faraday's Law & Lenz Law |
70%
From NCERT
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A conducting circular loop is placed in a uniform magnetic field, B=0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s−1. The induced emf, when the radius is 2 cm, is:
1. 2π μV
2. π μV
3. π2 μV
4. 2 μV
Subtopic: Faraday's Law & Lenz Law |
77%
From NCERT
AIPMT - 2010
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A square wire loop of resistance 0.5 Ω/m, having a side 10 cm and made of 100 turns is suddenly flipped in a magnetic field B, which is perpendicular to the plane of the loop. A charge of 2×10−4 C passes through the loop. The magnetic field B has the magnitude of:
1. 2×10−6 T
2. 4×10−6 T
3. 2×10−3 T
4. 4×10−3 T
1. 2×10−6 T
2. 4×10−6 T
3. 2×10−3 T
4. 4×10−3 T
Subtopic: Magnetic Flux |
From NCERT
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A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is:
| 1. | twice per revolution. |
| 2. | four times per revolution. |
| 3. | six times per revolution. |
| 4. | once per revolution. |
Subtopic: Faraday's Law & Lenz Law |
74%
From NCERT
AIPMT - 2013
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