# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1985 - 1988 of 2320

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## Question number: 1985

» Rotational Motion » Moment of Inertia

### Question

From a uniform wire, two circular loops are made loop-P of radius r and loop-Q of radius nr. Materials of both the loops are same. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 8 times that of P about a similar axis, the value of *n* is (diameter of the wire is very much smaller than r or nr)

### Choices

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

a. | 8 | |

b. | 4 | |

c. | 2 | |

d. | 6 |

## Question number: 1986

» Gravitation » Gravitational Acceleration

### Question

At what height above the earth’s surface does the force of gravity decrease by 10%? Assume radius of earth to be 6370 km.

### Choices

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

a. | 150 km | |

b. | 300 km | |

c. | 345 km | |

d. | 245 km |

## Question number: 1987

» Rotational Motion » Moment of Inertia

### Question

### Assertion (Ꭺ)

Moment of inertia of a particle is same, whatever be the axis of rotation.

### Reason (Ꭱ)

Moment of inertia depends on mass and perpendicular distance of the particle from its axis of rotation.

### Choices

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

a. | Both Ꭺ and Ꭱ are false | |

b. | Ꭺ is false but Ꭱ is true | |

c. | Ꭺ is true but Ꭱ is false | |

d. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |

## Question number: 1988

» Rotational Motion » Moment of Inertia

### Question

ABC is a triangular plate of uniform thickness. The sides are in the ratio shown in the figure. I _{AB}, I _{BC}, I _{CA} are the moments of inertia of the plate about AB, BC, CA respectively. For this arrangement which one of the following relation is correct?

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | I |