Select Chapter Topics:

A long solenoid with \(15\) turns per cm has a small loop of area \(2.0\) cm^{2} placed inside the solenoid normal to its axis. If the current carried by the solenoid changes steadily from \(2.0\) A to \(4.0\) A in \(0.1\) s, what is the induced emf in the loop while the current is changing?

1. | \(7.5 \times 10^{-6}~ \text{V}\) | 2. | \(6.5 \times 10^{-6}~\text{V}\) |

3. | \(7.5 \times 10^{-5}~\text{V}\) | 4. | \(6.5 \times 10^{-5}~\text{V}\) |

Subtopic: Faraday's Law & Lenz Law |

60%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A \(1~\text{m}\) long metallic rod is rotating with an angular frequency of \(400~\text{rad/s}\)$$ about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic field of \(0.5~\text{T}\) parallel to the axis exists everywhere. The emf induced between the centre and the ring is:

1. \(200~\text{V}\)

2. \(100~\text{V}\)

3. \(50~\text{V}\)

4. \(150~\text{V}\)

Subtopic: Motional emf |

75%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad/s in a uniform horizontal magnetic field of magnitude $3\times {10}^{-2}T.$ The maximum emf induced in the coil is:

1. 0.603 V

2. 0.01 V

3. 0

4. 1 V

Subtopic: Motional emf |

54%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

A horizontal straight wire \(10\) m long extending from east to west is falling with a speed of \(5.0\) ms^{-1} at right angle to the horizontal component of the earth's magnetic field, \(0.30 \times 10^{-4} ~\text{Wb m}^{-2}\). The instantaneous value of the emf induced in the wire is:

1. | \(2.5 \times 10^{-3} ~\text V\) | 2. | \(1.5 \times 10^{-4} ~\text V\) |

3. | \(2.5 \times 10^{-4}~\text V\) | 4. | \(1.5 \times 10^{-3} ~\text V\) |

Subtopic: Motional emf |

81%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Current in a circuit falls from \(5.0\) A to \(0\) A in \(0.1~\text{s}\). If an average emf of \(200\) V is induced, the self-inductance of the circuit is:

1. \(4\) H

2. \(2\) H

3. \(1\) H

4. \(3\) H

Subtopic: Self - Inductance |

90%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A rectangular wire loop of sides \(8\) cm and \(2\) cm with a small cut is moving out of a region of the uniform magnetic field of magnitude \(0.3\) T directed normal to the loop. What is the EMF developed across the cut if the velocity of the loop is \(1\) cm/s in a direction normal to the longer side?

1. \(2.4 \times10^{-4}~\text V\)

2. \(2.0 \times10^{-3}~\text V\)

3. \(1.3 \times10^{-4}~\text V\)

4. \(1.7 \times10^{-3}~\text V\)

Subtopic: Motional emf |

77%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A pair of adjacent coils has a mutual inductance of \(1.5\) H. If the current in one coil changes from \(0\) to \(20\) A in \(0.5\) s, what is the change of flux linkage with the other coil?

1. | \(35\) Wb | 2. | \(25\) Wb |

3. | \(30\) Wb | 4. | \(20\) Wb |

Subtopic: Mutual Inductance |

87%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A jet plane is traveling towards the west at a speed of \(1800\) km/h. What is the voltage difference developed between the ends of the wing having a span of \(25\) m, if the Earth’s magnetic field at the location has a magnitude of \(5\times 10^{-4}~\text{T}\) and the dip angle is \(30^{\circ}\).

1. \(2.712~\text{V}\)

2. \(3.125~\text{V}\)

3. \(1.112~\text{V}\)

4. \(3.011~\text{V}\)

1. \(2.712~\text{V}\)

2. \(3.125~\text{V}\)

3. \(1.112~\text{V}\)

4. \(3.011~\text{V}\)

Subtopic: Motional emf |

77%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

If a loop changes from an irregular shape to a circular shape, then magnetic flux linked with it:

1. Decreases

2. Remains constant

3. First decreases and then increases

4. Increases

Subtopic: Magnetic Flux |

52%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

It is desired to measure the magnitude of the field between the poles of a powerful loudspeaker magnet. A small flat search coil of area $2c{m}^{2}$ with 25 closely wound turns, is positioned normal to the field direction, and then quickly snatched out of the field region. Equivalently, one can give it a quick 90° turn to bring its plane parallel to the field direction). The total charge flown in the coil (measured by a ballistic galvanometer connected to the coil) is 7.5 mC. The combined resistance of the coil and the galvanometer is 0.50 $\Omega $. The field strength of the magnet is:

1. 0.55 T

2. 0.75 T

3. 0.67 T

4. 0.49 T

Subtopic: Faraday's Law & Lenz Law |

73%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links