# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 745 - 749 of 2320

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## Question number: 745

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

### Question

An inductive circuit contains resistance of 10Ω and an inductance of 20 *H.* If an ac voltage of 120 V and frequency 60 Hz is applied to this circuit, the current would be nearly

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0.48 A | |

b. | 0.32 A | |

c. | 0.80 A | |

d. | 0.016 A |

## Question number: 746

» Laws of Motion » Force and Inertia

### Question

A body of mass 50 kg is pulled by a rope of length 8 m on a surface by a force of 108N applied at the other end. The force that is acting on 50 kg mass, if the linear density of rope is 0.5 kg/m will be –

### Choices

Choice (4) | Response | |
---|---|---|

a. | 116 N | |

b. | 108 N | |

c. | 100 N | |

d. | 92 N |

## Question number: 747

» Electromagnetic Induction & Alternating Currents » Faraday's Law

### Question

The magnetic flux passing perpendicular to the plane of the coil and directed into the paper is varying according to the relation , where is in milli-weber and t is in second. Then the magnitude of emf induced in the loop when t = 2 second is-

### Choices

Choice (4) | Response | |
---|---|---|

a. | 31 mV | |

b. | 19 mV | |

c. | -6 mV | |

d. | -14 mV |

## Question number: 748

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

### Question

A 20 volt ac is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is 12 *V*, the voltage across the coil is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 16 volt | |

b. | 10 volt | |

c. | 6 volt | |

d. | 8 volt |

## Question number: 749

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

### Question

A current of 10 A in the primary coil of a circuit is reduced to zero at a uniform rate in 10 ^{-3} second. If the coefficient of mutual inductance is 3H, the induced e. m. f. in the secondary coil will be,

### Choices

Choice (4) | Response | |
---|---|---|

a. | 30 kV | |

b. | 2 kV | |

c. | 20kV | |

d. | 3 kV |