Question # 1

Which quantity has the same units as impulse

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force

work

linear momentum

acceleration

The reciprocal of decay constant λ of a radioactive material is:

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Frequency

Half life

Year

Mean life

None of these

Root out of the conventional source of energy:

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Energy from biomass

Hydroelectric energy

Geothermal energy

None of these

The SI unit of charge is

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Ampere

Watt

Coulomb

Volt

Joule

A typical four stroke petrol engine undergoes how many successive processes in each cycle

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one

two

three

four

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

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maximum

zero

half of the maximum value

one third of the maximum value

A person starts his journey from a point 0, travels 4 Km SW, then 4 Km NW, and finally 4 Km north-east. At what distance is he now from point 0?

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0 Km

4 Km

8 Km

12 Km

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

If the volume of the gas is to be increased by 4 times, then

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Temperature and pressure must be doubled

At constant P the temperature must be increased by 4 times

At constant T the pressure must be increased by four times

It cannot be increased

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

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17 m/s

33 m/s

17.5 m/s

none

Which one of the following is the unit of electric field intensity

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JC^-1

Vm^-1

Cm^-1

CJ^-1

Radiation detector are used to

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measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at:

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800^oC

500^oC

300^oC

100^oC

None of these

Equal charges are given to two spheres of different radii. The potential will

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Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

If force and displacement are in opposite direction, the work done is taken as

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Positive work

Negative work

Zero work

Infinite work

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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0.5 J

2 J

0.25 J

1 J

The critical temperature of tin is

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1.18 K

4.2 K

3.72 K

7.2 K

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B is correct

Field lines are closer to each other in the region where the filed is

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Stronger

Weaker

Much weaker

Absent

None of these

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

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Minimum Work

Maximum Work

Zero Work

Negative Work

A cold soft drink is kept on the balance. When the cap is opened, then the weight

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Increases

Decreases

First increases, then decreases

Remains same

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

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1.25 J

12.5 J

125 J

None of these

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

The density of water is 10³kg/m³. The water pressure on a submarine is 2.0 x 10⁷N/m². The depth of the submarine below the surface of the water, in maters, is approximately

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200 m

11000 m

2000 m

8000 m

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