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# AIIMS (All India Institute of Medical Sciences) Physics: Questions 298 - 304 of 500

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## Question 298

### Question

MCQ▾In an A. C. circuit containing only inductor, the voltage –

### Choices

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

a. | Leads the current by 180° | |

b. | Leads the current by 90° | |

c. | Lags the current by 90° | |

d. | Remains in phase with the voltage |

## Question 299

### Question

MCQ▾The speed of sound in a gas at S. T. P. is and the density of the gas is . Find the number of degrees of freedom of a molecule of the gas.

### Choices

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

a. | 3 | |

b. | 6 | |

c. | 5 | |

d. | 4 |

## Question 300

### Question

MCQ▾Two bodies with kinetic energies in the ratio of are moving with equal linear momentum. The ratio of their masses is –

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 301

### Question

MCQ▾A radioactive substance decays to of its initial activity in 20 days. The half-life of the radioactive substance expressed in days is –

### Choices

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

a. | 8 | |

b. | 12 | |

c. | 2 | |

d. | 6 |

## Question 302

### Question

MCQ▾For sky wave propagation of a 18 MHz signal, what should be the minimum electron density in ionosphere –

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 303

### Question

MCQ▾A bullet loses of its velocity when it passes through a plank. Find the maximum number of planks through which it can pass.

### Choices

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

a. | 9 | |

b. | 10 | |

c. | 3 | |

d. | 5 |

## Question 304

### Question

MCQ▾A boy standing on a long rail road car throws a ball up (straight) with a velocity . The car is moving on the horizontal road with acceleration 3 , How far behind the boy will the ball fall?

### Choices

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

a. | 8m | |

b. | 48 m | |

c. | 12m | |

d. |