Question # 1

An object at the end of a spring oscillates with SHM of angular frequency 2 rad s-1 What is the period of oscillation.

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0.32 s

0.50 s

0.80 s

3.1 s

If mass attached to a spring increases then its time period.

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Increases

Decreases

Remains constant

Decreases slightly

Which of the following is not SI base unit.

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kilogram

Ampere

Coulomb

Mole

In an Isolated system , total energy of the vibrating's mass and spring is

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Low

High

Constant

Variable

The wave form of SHM is a

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Sine wave

Cosine wave

Square wave

Electromagnetic wave

The SI unit of coefficient of viscosity of

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kg m s-1

kg m-1 s-1

kg ms -2

Which of the following quantity has a unit that can be expressed in terms of just two different SI base units.

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Area

Change

Electric current

Length

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

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

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

For the angular momentum of a system to remains constant, the external torque should be

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small

Large

Neither small nor large

zero

Which of the following is not necessary for work to be done.

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A constant force

An applied force

A displacement

Force component along the displacement

Which of the following is not true.

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Velocity can be nagative

Velocity is a scalar

Speed is a vector

Speed can be negative

A ball is thrown straight up What is its acceleration just before it reaches the highest point.

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Zero

slightly less than g

Exactly g

Slightly greater than g

The unit formed by combining the fundamental untis of length , mass and time.

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Absolute units

Practical units

Bse unit

Derived units

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 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

The international acceptable scientific notation of a number 123.4 is

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12.34 x 10¹

1.234 x 10²

1.234 x 10³

0.123 x 10³

The horizontal range is equal for the angles.

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30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

The fundamental quantities which form the base of the SI are.

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mass, energy and time

mass, force and time

mass, length and time

mass , length and time

A ball mass 0.25 kg is thrown to a height of 20 m The change in G.P.E is

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49 J

50 J

-75 J

500 J

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