EASY
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{\displaystyle P(t)=I(t)\cdot V(t)} is the given formula for electrical power, where V(t) denotes _____.

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Important Questions on Work, Power and Energy

MEDIUM
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A boy of mass 50 kg runs a stair case of 45 steps in 9 sec. If the height of each steps is 15 cm, find his power. (Take g=10 ms-2).
EASY
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A person of mass 100 kg reaches a height in 10 seconds. Find the power used by the person (g=10 ms2).
EASY
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How is the unit horsepower related to the SI unit of power?
EASY
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1 horse power (HP) is equal to:
HARD
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A person of 75 kg climbs up to a height of 5 m in 25 sec. Calculate the power consumed by the person. (g=10m/s2)
EASY
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A crane 'A' lifts a heavy load in 5 seconds, whereas another crane 'B' does the same work in 2 seconds. Compare the power of crane 'A' to that of crane 'B'.
EASY
Science>Physics>Work, Power and Energy>Power
State and define the SI unit of power.
EASY
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If a pump can lift 200 kg of water through a height of 6 m in 10 seconds, then its power is
MEDIUM
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By using which of the following formula, the unit of power can be accomplished?
EASY
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How much energy is used for boiling water in a 2 kW kettle for 10 minutes? Calculate it in watt-hour.
EASY
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A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
EASY
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If a light uses energy of 100 J and remains on for 25 s Of time, then what is the power consumed by the light ?
EASY
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_____ is the SI unit of power density.
MEDIUM
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An electric oven of 3 kW is connected to the mains of 220 V. Calculate:

The cost of electrical energy consumed if the cost per unit is Rs. 6.50 and if the oven is switched on for an hour.

EASY
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The highest penetration power of given following radiations will be _____.
EASY
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Sugar dissolves faster in hot water than in cold water because _____
EASY
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Through which of the following equipment chemical energy is transformed into electrical energy?
MEDIUM
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Which of the following is not a unit of Power?
EASY
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SI unit of Power is _____.
EASY
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P(r)=I(4πr2) is related to _____.