Two circuits have coefficient of mutual induction of 0.09 *henry*. Average e.m.f. induced in the secondary by a change of current from 0 to 20 *ampere* in 0.006 *second* in the primary will be**:**

1. 120 *V*

2. 80 *V*

3. 200 *V*

4. 300 *V*

Subtopic: Mutual Inductance |

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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%

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With the decrease of current in the primary coil from 2 A to zero in 0.01 s, the e.m.f. generated in the secondary coil is \(1000~\mathrm{V}\). The mutual inductance of the two coils is:

1. 1.25 H

2. 2.50 H

3. 5.00 H

4. 10.00 H

Subtopic: Mutual Inductance |

88%

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The coefficient of mutual inductance between two coils depends upon:

1. | medium between coils |

2. | separation between coils |

3. | orientation of coils |

4. | All of these |

Subtopic: Mutual Inductance |

86%

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Two coils of 10 turns each are arranged such that the mutual inductance between them is 150 mH. The magnetic flux linked through one coil when 2 amperes current will flow in another coil, will be:

1. $1\times {10}^{-3}Wb$ $$

2. $10\times {10}^{-3}Wb$ $$

3. $20\times {10}^{-3}Wb$ $$

4. $30\times {10}^{-3}Wb$ $$

Subtopic: Mutual Inductance |

85%

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Two coaxial coils are very close to each other and their mutual inductance is 5 mH. If a current 50 sin 500t is passed in one of the coils, then the peak value of induced e.m.f. in the secondary coil will be:

1. | 5000 V | 2. | 500 V |

3. | 150 V | 4. | 125 V |

Subtopic: Mutual Inductance |

75%

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Two coils have a mutual inductance of 5 mH. The current changes in the first coil according to the equation \(I=I_{0}cos\omega t,\) where \(I_{0}=10~A\) and $\omega $ = 100$\pi $ rad/s. The maximum value of e.m.f. induced in the second coil is:

1. 5$\pi $ Volt

2. 2$\pi $ Volt

3. 4$\pi $ Volt

4. $\pi $ Volt

Subtopic: Mutual Inductance |

81%

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A small square loop of wire of side '*l*' is placed inside a large square loop of side '*L*' (L$\gg $l). If the loops are coplanar and their centres coincide, the mutual inductance of the system is directly proportional to:

1. L/l

2. l/L

3. L^{2}/l

4. l^{2}/L

Subtopic: Mutual Inductance |

72%

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Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be:

1. | maximum in the situation (A). |

2. | maximum in the situation (B). |

3. | maximum in the situation (C). |

4. | the same in all situations. |

Subtopic: Mutual Inductance |

74%

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A straight solenoid has 50 turns per cm in primary coil and 200 turns in the secondary coil. The area of cross-section of the solenoid is 4 cm^{2}. Calculate the mutual inductance.

1. 5.0 H

2. $5.0\times {10}^{-4}H$

3. 2.5 H

4. $2.5\times {10}^{-4}H$

Subtopic: Mutual Inductance |

70%

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