Question # 1

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

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

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3RΩ

2R/4Ω

R/3Ω

2R/3Ω

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

The branch of physics which concerned with the ultimate particles of which the universe is composed is known as

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SolidState physics

Particle Physics

Nuclear Physics

Atomic Physics

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

Good absorbers of heat are

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Poor emitters

Non emitters

Good emitters

Highly polarized

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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Longitudinal waves

Transverse waves

Water waves

Complex waves

An electron of the hydrogen atom in the second orbit is called its:

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Ground state

Excited state

Ionized state

Any of these

None of these

Electron is a particle whose mass is:

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Greater than that of a proton

Smaller than of a proton and greater than mass of neutron

Smaller than that of proton or neutron

Greater than that of an atom

Max Planck received the Nobel Prize for his discovery of energy quants in:

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1718 AD

1918 AH

1818 AD

1918 AD

None of these

The angle of incidence at which angle of refraction becomes 90⁰ is called

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Incident angle

Angle of refraction

Critical angle

Phase angle

A chiminey works best when it is

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Tall

Exposed to air currents

Not tall but wide

a and b

The energy stored in a wound watch spring is

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K.E

P.E

Heat energy

Chemical energy

A convex ens acts as diverging lens when the object is placed

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Between F and 2F

At 2F

Within the focal length

Beyond 2F

A double convex lens act as a diverging lens when the object is

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Inside the focus

Between f and 2f

At the focus

At a large distance

How many main frontiers are of fundamental science ?

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One

Two

Three

None of these

If the velocity-time graph is a straight line, then it is

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parallel to velocity-time

parallel to time axis

inclined to velocity axis

inclined to time-axis

Reduce the following figure up to three significant figure 64.4567

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64.5

64.4

64.3

None

A person is standing on a rotating stool spreading his arms.He suddenly contracts his arms.His

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Angular momentum increases

Momentum of inertia increases

Momentum of inertia decreases

Angular momentum decreases

The weight of 10 kg body falling freely is

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zero

98 N

9.8 N

10 N

The fundamental unit of the quantity of matter is

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Kg

Mol

Gm

Meter

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