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. $$10$$
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
Subtopic:  Power |
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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
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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