Both kinetic energy and potential energy

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One kilowatt hour is equal to:

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Important Questions on Effect of Energy: Work, Power and Energy

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

How fast should a man weighing

600 N

run to achieve a kinetic energy of

750 J

. Take

g = 10 m s^{- 2}

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Flying birds has

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Ratio of potential energies of body A and body B will be

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A particle is moving unidirectional on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) – time (t) graph that describes the motion of the particle is (graphs are drawn schematically and are not to scale):

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A spring of spring constant $K = 4 x 10^{3} N / m$ is compressed by $2 cm$ , then determine the potential energy stored in spring.

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The heart of a man pumps

5

litres of blood through the arteries per minute at a pressure of

150 mm

of mercury. If the density of mercury be

13.6 \times 10^{3} k g m^{- 3}

and

g = 10 m s^{- 2}

, then the power of heart in watt is:

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Which of the following graphs best represent the graphical relationship between Kinetic Energy

(K . E)

and momentum

(P)

of a body in motion?

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A current of

2 mA

was passed through an unknown resistor which dissipated a power of

4.4 W .

Dissipated power when an ideal power supply of

11 V

is connected across it is:

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Write in your words the definition of potential energy.

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A block of

9 kg

is moving with a velocity of

4 m / s

on a frictionless surface. The block comes to rest by compressing the spring. If the spring constant is

4 x 10^{4} N / kg

, then find the compression in the spring.

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

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)

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The energy produced by converting one microgram of matter completely into energy will be

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The diagram below shows a dual control switch circuit connected to a bulb. Out of A & B which one is the live wire and which one is the neutral wire?

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

What is the use of

watt - hour

meter in a household circuit?

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A filament bulb

(500 W, 100 V)

is to be used in a

230 V

main supply. When a resistance,

R

is connected in series, it works perfectly and the bulb consumes

500 W

. The value of

R

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Two electric bulbs, rated at

(25 W, 220 V)

and

(100 W, 220 V),

are connected in series across a

220 V

voltage source. If the

25 W

and

100 W

bulbs draw powers

P_{1}

and

P_{2}

respectively, then:

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

An object of mass

15 kg

is moving with uniform velocity of

4 m / s

. What is the kinetic energy possessed by the object?

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Two bodies A and B have masses in the ratio

5 : 1

and their kinetic energies are in the ratio

125 : 9

. Find the ratio of their velocities.

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

1 kWh

equal to

One kilowatt hour is equal to:

Important Questions on Effect of Energy: Work, Power and Energy

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