Question # 1

Drag force increases if speed of the object moving through the fluid:

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Increases

Decreases

Remains constant

None of these

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

Alternating current is produced by a voltage source which polarity:

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Remains the same

Reverse after period T

Keeps on reversing with time

Reverse after every time interval T/2

Both (C) and (D)

Surface density of charge is defined as

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Charge per unit volume

Charge per unit length

Charge per unit area

Charge per unit mass

The electrons occupying the conduction band are known as

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conduction electrons

free electrons

both of them

none of them

Which of the following is scalar quantity?

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Electric potential

Velocity

Momentum

Force

Wave length of that color as compared to that of violet color is:

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Smaller

Longer

Equal

None of these

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 Kg

3 Kg

4 Kg

8 Kg

Physics details with the study of:

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Matter

Energy

Both of them

Human body

Which quantity has different dimensions:

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Work

Pressure

Energy

Torque

The engine of a car produces acceleration of 4 m/s²in the car.If this car pulls another car same mass,what will be the acceleration produces in m/s²

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2

8

4

12

In the stress-strain graph stress is increased linearly with strain until a point is reached this point is known as

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Plastic limit

Plastic deformation

Proportional limit

Elastic behaviour

The kinetic energy of a body of mass 2 kg and momentum of 2 Ns is

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1 J

2 J

3 J

4 J

Can you add zero to a null vector ?

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No

Yes

Yes in some cases

None of these

Two sources of waves are called coherent if

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Both have the same amplitude of vibrations

Both produce waves of the same wavelength

Both produce waves of the same wavelength having a constant phase difference

Both produce waves having the same velocity

The correct statement about poissons ratio is

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Its unit is N/m²

It is dimensionless

Its unit is Newton

Its dimensions MLT²

Which of the following have the same unit:

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Stress

Strain

Modulus elasticty

Both (A) and (C)

Both (A) and (B)

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wavefront

Wave number

None of these

The minute hand of a large clock is 3.0 m long. What is its mean angular speed

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1.4 x 10^-4 rad s^-1

1.7 x 10^-3 rad s^-1

5.2 x 10^-3 rad s^-1

1.0 x 10^-1 rad s^-1

Femto means

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10^-15

10^-18

10^-2

10^-12

Huygen principle is used to determine:

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Speed of light

Location of wavefront

About polarized and unpolarized light

None of them

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