Question # 1

The electric flux is linked with a surface will be maximum when

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The surface is held parallel to the electric field

The surface is held perpendicular to the electric field

The surface makes an angle of 45° with the electric field

All of the above

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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element

daughter element

parent element

none of these

Such oscillations in which the amplitude decreases steadily with time, are called

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resonance

force oscillations

large oscillations

damped oscillations

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

An oscillating body oscillates due to:

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Applied force

Restoring force

Frictional force

None of these

In LCR circuit which one of the following statement is correct?

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L and R oppose each other

R value increase with frequency

The inductive reactance increases with frequency

The capacitive reactance increases with frequency

The discuss used by athlete has a mass of 1 kg, its weight in newton is

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9.8 N

80 N

98 N

100 N

Peak value of alternative current is:

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one of its Instantaneous value

Equal to its RMS value

The same as its peak-to-peak value

Both (B) and (C)

None of these

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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subsonic speed

sonic speed

super sonic speed

any one of them

Critical angle of light passing from glass to air is minimum for

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Red

Green

Yellow

Violet

In newton's rings apparatus, we also use:

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Spectroscope

Telescope

Microscope

Any of these

Which of the following is dimensionally correct

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Pressure = energy per unit area

Pressure = energy per unit volume

Pressure = force per unit volume

Pressure = Momentum per unit volume per unit time

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all material

a given material

all of them

The linear acceleration of the particle of mass m describing a horizontal circle of radius r with angular speed ω is

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rω

ω/r

rω²

r²ω

Which characteristics of wave, established the Huygen's wave theory in 1801?

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polarization

interference

propagation

all of them

If C and R denote capacity and resistance,the dimensional formula of CR is

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M°L°T^-1

M°L°T°

Not expressible in terms of MLT

A two-slit arrangement is set up to produce an interference pattern on a screen. The fringes are too close together for convenient observation. How could the distance between them be increased?

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by using a light of longer wavelength

by increasing the width of the slits

by decreasing the distance between the screen and slits

the distance between the fringes is impossible

A 2 kg body and a 2 kg body have equal momentum. if the kinetic energy of 3 kg body is 10 j. The K.E of 2 kg body will be

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6.66 j

15 j

22.5 j

45 j

If force of friction is negligible, then acceleration of two free falling objects of different masses is

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The same

Different

Smaller mass has smaller acceleration

None of these

Light is a type of energy which produces sensation of

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Sound

Feeling

Vision

None of these

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