Question # 1

Acceleration of body executing SHM is always directed towards

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Extreme position

Mean position

Along the direction of motion

None

1 gm-cm^-3is equal to

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10³kg-m^-3

10^-3kg-m^-3

1kg-m^-3

10⁶kg-m^-1

A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

One complete round trip of the body about its mean position is called

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displacement

vibration

a complete motion

an acceleration

In case of two identical charges placed certain distance apart, the electric field lines are:

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Straight lines

Sine curves

Curved

Both (A) and (B)

None of these

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

For a fixed force, larger is the mass of a body, the

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greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

Newton's laws are empirical laws, deduced from

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Theories

Experiments

Facts

None of these

A radioactive substance has a half-life of 4 months. Three-fourths of the substance will decay in:

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5months

6months

8months

7months

Aquifier is a layer of rock holding water that allows water to percolate through it with

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Temperature

Pressure

Steams

None of these

Huygen principle is used to determine:

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Speed of light

Location of wavefront

About polarized and unpolarized light

None of them

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h.His average speed will be.

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40 km/h

48 km/h

50 km/h

60 km/h

The expression of energy stored in an inductor of length L and current I can be expressed by a relation

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1/2 LI²

1/2 I²L

1/2 I²L²

1/2 IL

A compound microscope is consists of

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One convex lens

Two convex lenses

Two concave lenses

None of these

A process in which no heat enters or leaves the system is called.

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Adiabatic process

Isothermal process

Isochoric process

None of these

When the object is closer to eye or near point, the image becomes

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Sharp

Clear visible

Blurred

None of these

Petrol engine coverts ____________ of available heat energy into work.

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20% to 25%

25% to 30%

30% to 35%

35% to 40%

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