A current-carrying cable is penetrating a loop as shown in the figure. If the magnitude of the current is decreasing with time, then the current induced in the loop is

1. Zero

2. Clockwise

3. Anticlockwise

4. Depends on the magnitude of the current

Subtopic:  Motional emf |
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 has an inductance of 20 H and a resistance of 5 ohms. It is connected to a battery of 20 volts. The maximum magnetic energy stored in the magnetic field of the solenoid is

1. 40 J

2. 160 J

3. 320 J

4. 80 J

Subtopic:  Self - Inductance |
 88%
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 slotting processes in a metallic sheet results in:

1. The increase of the resistance in the path for circulation of current.
2. Decrease in the strength of eddy current.
3. A feeble in the electromagnetic damping.
4. All of these
Subtopic:  Eddy Current |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The square loop shown below is rotated about the axis PQ and magnetic field is perpendicular to the plane of the paper. The magnitude of induced emf in the loop is minimum when the plane of the loop:

1. is perpendicular to the plane of the paper.

2. is parallel to the plane of the paper.

3. makes 45° angle with the plane of the paper.

4. makes 60° angle with the plane of the paper.

Subtopic:  Motional emf |
 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 small square-shaped loop of edge length l is placed at the centre of a circular loop A of radius r with its plane perpendicular to the plane of the circular loop. The coefficient of mutual induction of this combination is 

1. Zero

2. μ02lr23π

3. μ02l2r3

4. μ03l22r

Subtopic:  Mutual Inductance |
 62%
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 horizontal ring of radius r spins about its vertical axis with an angular velocity ω in a uniform vertical magnetic field of magnitude B. The emf induced in the ring is

1. Zero

2. πr2Bω

3. 12Bωr2

4. Bωr2

Subtopic:  Motional emf |
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

If N is the total number of turns in a coil, then the value of self-inductance varies as

1. N°

2. N

3. N2

4. N

Subtopic:  Self - Inductance |
 83%
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

Eddy currents are produced in a material when it is:
 

1. heated.
2. placed in an electric field.
3. placed in a uniform constant magnetic field.
4. placed in a time-varying magnetic field.

Subtopic:  Eddy Current |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Lenz's law associated with Faraday's laws of electromagnetic induction are consequence of the conservation of

1. Charge

2. Energy

3. Magnetic field

4. Mass

Subtopic:  Faraday's Law & Lenz Law |
 88%
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

Self inductances of two uncoupled coils are 40 mH and 90mH. Their mutual inductance is

1. 60 mH

2. 130 mH

3. 50 mH

4. Zero

Subtopic:  Mutual Inductance |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints