At any instant of time \(t\), the displacement of any particle is given by \(2t-1\) (SI unit) under the influence of force of \(5~\text N\). The value of instantaneous power is (in SI unit):

1. \(5\)

2. \(7\)

3. \(6\)

4. \(10\)

1. \(5\)

2. \(7\)

3. \(6\)

4. \(10\)

Subtopic: Power |

73%

From NCERT

NEET - 2024

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A particle moves with a velocity \((5\hat i-3\hat j+6\hat k)\) ms^{-1} horizontally under the action of constant force \((10\hat i+10\hat j+20\hat k)\) N. The instantaneous power supplied to the particle is:

1. \(200\) W

2. zero

3. \(100\) W

4. \(140\) W

1. \(200\) W

2. zero

3. \(100\) W

4. \(140\) W

Subtopic: Power |

74%

From NCERT

NEET - 2023

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The energy that will be ideally radiated by a \(100\) kW transmitter in \(1\) hour is:

1. \(1\times 10^{5}\) J

2. \(36\times 10^{7}\) J

3. \(36\times 10^{4}\) J

4. \(36\times 10^{5}\) J

1. \(1\times 10^{5}\) J

2. \(36\times 10^{7}\) J

3. \(36\times 10^{4}\) J

4. \(36\times 10^{5}\) J

Subtopic: Power |

74%

From NCERT

NEET - 2022

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An electric lift with a maximum load of \(2000\) kg (lift+passengers) is moving up with a constant speed of \(1.5\) ms^{–1}. The frictional force opposing the motion is \(3000\) N. The minimum power delivered by the motor to the lift in watts is: (Take \(g=10\) ms^{–2})

1. | \(23500\) | 2. | \(23000\) |

3. | \(20000\) | 4. | \(34500\) |

Subtopic: Power |

63%

From NCERT

NEET - 2022

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Water falls from a height of 60m at the rate of 15kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? (g=10 m/${s}^{2}$)

1. 8.1 kW 2. 10.2 kW

3. 12.3 kW 4. 7.0 kW

Subtopic: Power |

78%

From NCERT

NEET - 2021

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