Question # 1

The obvious effect/s of current is/are:

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Heating effect

Magnetic effect

Chemical effect

Both (C) and (B)

All of these

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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Wavelength

Frequency

Energy

Temperature

All of these

Physics details with the study of:

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Matter

Energy

Both of them

Human body

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

Which one of the following physical quantities changes with relativistic speed

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Length

Mass

Time

All of the above

Each atom in metal crystal:

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Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about center of a crystal

None of these

If both the inputs given to a gate ae 1 such that the output is 0, then it is:

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AND gate

NOR gate

OR gate

NOT gate

Both (A) and (C)

The equation of continuity

A₁V₁= A₂V₂is for the flow of

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an ideal fluid

an incompressible fluid

a non visconcous fluid

all of the above

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

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second law thermodynamics

first law of thermodynamics

third law of thermodynamics

none of them

Real gases strictly obey gas law at:

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High pressure and low temperatures

Low pressures and high temperatures

High pressures and high temperatures

None of these

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

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its weight

tension in the string

viscous drag force by air

all of them

According to Einsteins theory, gravity follows the inverse square law expect in

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Weak gravitational field

Strong gravitational field

Very very weak gravitational field

None of these

Absolute potential at infinity is

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Maximum

Minimum

Zero

None of these

If stress is increased beyond the elastic limit a permanent change in the material is observed This behavior is called

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Elastic deformation

Elasticity

Plasticity

Yield strength

The term impulse means, the force applied on a body for

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Permanently

Temporary

Very short interval of time

None of these

Substance which break just after the elastic limit is crossed are called

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Soft subtances

Hard substances

Brittle substances

Ductile substances

Two charges are separated by 0.5 m. Now the 0.25 m distance between the two charges is reduced to half of the first distance, how would the electric force become

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4 times

8 times

12 times

16 times

Which branch of physics deal with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state Physics

In an ideal gas, the molecules have:

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Kinetic energy only

Potential energy only

Both KE and PE

None of these

If a light of λ = 588 nm falls on half silvered glass plate in Michelson s interferometer if movable mirror is moved through 0.233 mm the number of fringes will be observed to shift

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795

792

786

None

A boat of mass 40 kg os at rest.A dog of mass 4 kg moves in the boat with a velocity of 10 m/s.What is the velocity of boat?

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4 m/s

2 m/s

8 m/s

1 m/s

A line normal to the wavefront including the direction of motion is called

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perpendicular line

parallel line

a ray of light

none of them

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