# NEET Physics: Questions 77 - 82 of 2099

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## Question number: 77

» Physics and Measurement » SI Units

### Question

10 the unit of Stefan’s constant a is

### Choices

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

a. | Wm | |

b. | Wm | |

c. | Wm | |

d. | Wm |

## Question number: 78

» Physics and Measurement » Errors in Measurement

### Question

A physical parameter a can be determined by measuring the parameters b, c, d and e using the relation a =

If the maximum errors in the measurement of b, c, d and e are b1 %, c1 %, d1 %, and e1 %, then the maximum error in the value of a determined by the experiment is

### Choices

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

a. | (b | |

b. | (b | |

c. | (b | |

d. | (b |

## Question number: 79

» Physics and Measurement » Errors in Measurement

### Question

If L = 2.331 cm, B = 2.1 cm, then L + B =

### Choices

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

a. | 4, 43 cm | |

b. | 4 cm | |

c. | 4.431 cm | |

d. | 4.4 cm |

## Question number: 80

» Physics and Measurement » Errors in Measurement

### Question

In an experiment, the following observations were recorded: L = 2.820 m, M = 3.00 kg, *l* = 0.087 cm, Diameter D = 0.041 cm. Taking g = 9.81 m/s2 using the formula, Y =

, the maximum percentage error in Y is

### Choices

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

a. | 6.50 % | |

b. | 4.56 % | |

c. | 7.96 % | |

d. | 8.42 % |

## Question number: 81

» Kinematics » Average Speed and Instantaneous Velocity

### Question

Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing is

### Choices

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

a. |
2s | |

b. |
2V√3s | |

c. | Both c. and d. are correct | |

d. |
4√3s |

## Passage

The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 3500Hz is used. The first resonating length is measured as 14.6 cm and the second resonating length is measured as 24.0 cm.

## Question number: 82 (1 of 2 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

### Question

Calculate the end correction.

### Choices

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

a. | 9.9 cm | |

b. | 9.2 cm | |

c. | 9.1 cm | |

d. | 9.4 cm |