# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 72 - 76 of 2320

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## Question number: 72

» Physics and Measurement » Dimensions of Physical Quantities

### Question

The frequency of vibration of string is given by v = [Fm] ^{1/2} Here P is number of segments in the string and *l* is the length. The dimensional formula for m will be

### Choices

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

a. | [M L | |

b. | [M L | |

c. | [M | |

d. | [M |

## Question number: 73

» Kinematics » Average Speed and Instantaneous Velocity

### Question

the distance between two particles is decreasing at the rate of 6 m/sec. If these particles travel with same speeds and in the same direction, then the separations increase at the rate of 4 m/s. The particles have speeds as

### Choices

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

a. | 5 m/sec; 1 m/sec | |

b. | 5 m/sec; 2 m/sec | |

c. | 4 m/sec; 2 m/sec | |

d. | 4 m/sec; 1 m/sec |

## Question number: 74

» Physics and Measurement » Errors in Measurement

### Question

The percentage errors in the measurement of mass and speed are 2 % and 3 % respectively. How much will be the maximum error in the estimation of the kinetic energy obtained by measuring mass and speed?

### Choices

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

a. | 1% | |

b. | 8 % | |

c. | 5 % | |

d. | 11 % |

## Question number: 75

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

### Question

The number of significant figures in all the given numbers 25.12,2009,4.156 and l. 217 x 10 - 4 is

### Choices

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

a. | 1 | |

b. | 2 | |

c. | 3 | |

d. | 4 |

## Question number: 76

» Kinematics » Motion in a Straight Line

### Question

A particle of mass m moves on the x-axis as follows: it starts from rest at t = 0 from the point x - 0 and comes to rest at t = 1 at the point x = 1. No other information is available about its motion at intermediate time (0 < t < 1). If a denotes the instantaneous acceleration of the particle, then

### Choices

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

a. | A cannot remain positive for all t in the interval 0 | |

b. | Cannot exceed 2 at any point in its path | |

c. | = 2 at any point in its path. | |

d. | Must be > 4 at some point or points in its path |