Question # 1

One light year is equal to.

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9.46 x 10¹⁵ cm

9.46 x 10¹⁵ m

9.46 x 10¹⁵ km

7.88 x 10¹⁴ m

Where should be the centre of gravity of a body.

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It must be within the body

It must be outside the body

It may be near but not essentially within the body

It changes its position after sometime

Candela is the SI base unit of.

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illuminance

Luminous flux

Luminous intensity

Radiant energy

Conventionally antilock wise torque is taken as.

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Zero

Positive

Infinity

Negative

The SI unit of gravitational constant G is.

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kg m-1 s-1

kg m2 s-2

kg m3 s-2

kg m2 s-1

The cross product of two vectors is magnitude when

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Vectors are parallel

Vectors are antiparallel

Vectors are perpendicular

They are rotated through 270^o

A fixed pulley is emplyed to

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Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

If two bodes are under a collision that is not perfectly elastic then.

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K.E. is conserved but momentum is not

Momentum is conserved but K.E. is not

Neither K.E. nor momentum is conserved

Both K.E. and momentum are conserved

The velocity of an object when projected from the earth in order to escape the earth's gravitational field is called the.

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Terminal velocity

Average velocity

Instant aeneous velocity

Escape velocity

What is the number of degree of freedom of an oscillating simple gravity pendulum

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1

2

3

4

On the ground the gravitational force on a satellite is W What is the gravitational force on the satellite when at height R/50

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0.96 W

0.98 W

1.04 W

1.02 W

Which of the following is renewable source of energy.

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Oil

Natural gas

Uranium

Sunlight

The work required to lift a ball of mass 'm' from the surface of the earth to an infinite distance is

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Absolute P.E. of the body

P.E of the body

K.E. of the body

Chemical energy of the body

It the force acting on a body is doubled its acceleration becomes.

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Half

Constant

Double

One fourth

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

Two forces act together on an object the magnitude of their resultant force is minimum when they act at

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0 ^o

45^oC

90^o

180 ^o

The consumption of energy by a 60 W bulb in 2 s is

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0.02 J

30 J

60 J

120 J

What are the dimensions of coefficient of velocity of

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[MLT-1]

[ML-1T-1]

[ML-2T-1]

[MLT-2]

Which one of the following pairs does not have the same dimensions.

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Force and weigfht

Pressure and stress

Capacitance and resistance

Energy and work

The angle subtended at the centre of a circle by an arc equal to its radius is equal to.

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One rotation

One radian

One degree

One revolution

The product of two non zero numbers is.

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A vector quantity

A unit vector

Always zero

Never equal to zero

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