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The magnetic energy stored in an inductor of inductance \(4~\mathrm{\mu H}\) carrying a current of \(2~\text{A}\) is:

1. \(8~\mathrm{\mu J}\)

2. \(4~\mathrm{\mu J}\)

3. \(4~\mathrm{mJ}\)

4. \(8~\mathrm{mJ}\)

1. \(8~\mathrm{\mu J}\)

2. \(4~\mathrm{\mu J}\)

3. \(4~\mathrm{mJ}\)

4. \(8~\mathrm{mJ}\)

Subtopic: Self - Inductance |

73%

From NCERT

NEET - 2023

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An emf is generated by an ac generator having \(100\) turn coil, of loop area \(1\) m^{2}. The coil rotates at a speed of one revolution per second and placed in a uniform magnetic field of \(0.05\) T perpendicular to the axis of rotation of the coil. The maximum value of emf is:

1. \(3.14\) V

2. \(31.4\) V

3. \(62.8\) V

4. \(6.28\) V

1. \(3.14\) V

2. \(31.4\) V

3. \(62.8\) V

4. \(6.28\) V

Subtopic: Motional emf |

71%

From NCERT

NEET - 2023

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A square loop of side \(1\) m and resistance \(1\) \(\Omega\) is placed in a magnetic field of \(0.5\) T. If the plane of the loop is perpendicular to the direction of the magnetic field, the magnetic flux through the loop is:

1. | \(0\) | 2. | \(2\) weber |

3. | \(0.5\) weber | 4. | \(1\) weber |

Subtopic: Magnetic Flux |

66%

From NCERT

NEET - 2022

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A big circular coil of \(1000\) turns and average radius \(10~\text{m}\) is rotating about its horizontal diameter at \(2~\text{rad s}^{-1}\). If the vertical component of earth's magnetic field at that place is \(2\times 10^{-5}~\text{T}\) and electrical resistance of the coil is \(12.56~\Omega,\) then the maximum induced current in the coil will be:

1. \(2~\text{A}\)

2. \(0.25~\text{A}\)

3. \(1.5~\text{A}\)

4. \(1~\text{A}\)

1. \(2~\text{A}\)

2. \(0.25~\text{A}\)

3. \(1.5~\text{A}\)

4. \(1~\text{A}\)

Subtopic: Faraday's Law & Lenz Law |

55%

From NCERT

NEET - 2022

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The current in an inductor of self-inductance \(4~\text{H}\) changes from \(4~ \text{A}\) to \(2~\text{A}\) in \(1~ \text s\). The emf induced in the coil is:

1. \(-2~\text{V}\)

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

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

4. \(8~\text{V}\)

Subtopic: Self - Inductance |

83%

From NCERT

NEET - 2022

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The dimensions of mutual inductance \((M)\) are:

1. \(\left[M^2LT^{-2}A^{-2}\right]\)

2. \(\left[MLT^{-2}A^{2}\right]\)

3. \(\left[M^{2}L^{2}T^{-2}A^{2}\right]\)

4. \(\left[ML^{2}T^{-2}A^{-2}\right]\)

Subtopic: Mutual Inductance |

72%

From NCERT

NEET - 2022

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An inductor coil of self-inductance \(10~\mathrm H\) carries a current of \(1~\mathrm A\) . The magnetic field energy stored in the coil is:

1. | \(10~\mathrm J\) | 2. | \(2.5~\mathrm J\) |

3. | \(20~\mathrm J\) | 4. | \(5~\mathrm J\) |

Subtopic: Self - Inductance |

83%

From NCERT

NEET - 2022

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The magnetic flux linked to a circular coil of radius \(R\) is;

\(\phi=2t^3+4t^2+2t+5\) Wb.

The magnitude of induced emf in the coil at \(t=5\) s is:

1. \(108\) V

2. \(197\) V

3. \(150\) V

4. \(192\) V

\(\phi=2t^3+4t^2+2t+5\) Wb.

The magnitude of induced emf in the coil at \(t=5\) s is:

1. \(108\) V

2. \(197\) V

3. \(150\) V

4. \(192\) V

Subtopic: Faraday's Law & Lenz Law |

85%

From NCERT

NEET - 2022

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Two conducting circular loops of radii \(R_1\)$\mathrm{and}$\(R_2\) are placed in the same plane with their centres coinciding. If \(R_1>>R_2\) the mutual inductance \(M\) between them will be directly proportional to:

1. \(\frac{R^2_1}{R_2}\)

2. \(\frac{R^2_2}{R_1}\)

3. \(\frac{R_1}{R_2}\)

4. \(\frac{R_2}{R_1}\)

Subtopic: Mutual Inductance |

59%

From NCERT

NEET - 2021

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The magnetic flux linked with a coil (in Wb) is given by the equation \(\phi=5 t^2+3 t+60\). The magnitude of induced emf in the coil at \(t=4\) s will be:

1. \(33\) V

2. \(43\) V

3. \(108\) V

4. \(10\) V

Subtopic: Faraday's Law & Lenz Law |

87%

From NCERT

NEET - 2020

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