# Oscillations and Waves-Simple Pendulum (NEET Physics): Questions 19 - 23 of 28

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## Question number: 19

» Oscillations and Waves » Simple Pendulum

### Question

The length of a simple pendulum is 2 m. The spherical bob which is empty from inside has a mass of 50 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be,

### Choices

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

a. | 4 sec | |

b. | 2 sec | |

c. | 1 sec | |

d. | 8 sec |

## Question number: 20

» Oscillations and Waves » Simple Pendulum

### Question

A pendulum suspended from the ceiling of a train has a period *T, * when the train is at rest. When the train is accelerating with a uniform acceleration a, the period of oscillation will,

### Choices

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

a. | Increase | |

b. | Become infinite | |

c. | Remain unaffected | |

d. | Decrease |

## Question number: 21

» Oscillations and Waves » Simple Pendulum

### Question

At any instant of time the displacement of a simple pendulum is 0.08 m and acceleration is 2 m/sec ^{2}; the angular velocity will be:

### Choices

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

a. | 10 radian/sec | |

b. | 5 radian/sec | |

c. | 4 radian/sec | |

d. | 0.1 radian/sec |

## Question number: 22

» Oscillations and Waves » Simple Pendulum

### Question

A simple pendulum is executing simple harmonic motion with a time period *. * If the length of the pendulum is increased by 21%, the percentage increase in the time period of the pendulum of is,

### Choices

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

a. | 10% | |

b. | 21% | |

c. | 30% | |

d. | 50% |

## Question number: 23

» Oscillations and Waves » Simple Pendulum

### Question

Identify wrong statements among the following,

(1) The greater the mass of a pendulum bob, the shorter is its frequency of oscillation

(2) A simple pendulum with a bob of mass m swings with an angular amplitude of 40°. When its angular amplitude is 20°, the tension in the string is less than mg cos 20 ^{0}.

(3) As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also increase.

(4) The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.

Select the correct answers and mark it according to the following codes:

### Choices

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

a. | 2 and 4 are correct | |

b. | 1 and 2 are correct | |

c. | 1, 2 and 3 are correct | |

d. | 1 and 3 are correct |