Question # 1

To sources are said to be coherent if they have:

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

There are some whose resistivity becomes zero below a certain temperature, called

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absolute zero

0°C

critical temperature

lower fixed point

The image of the tip of a needle is never sharp because of

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Polarization of light

Interference of light

Diffraction of light

Reflection of light

Torque is also called:

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Momentum

Linear inertia

Moment of a force

Mass

The phase angle of a series RLC circuit at resonance is

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180°

90°

0°

None of the these

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

The curie temperature of iron is about

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250°C

500°C

750°C

1000°C

The motion in a plane is the motion in

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one dimension

two dimension

three dimension

four dimension

The electric field will be uniform

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Near a positive point charge

Near a negative point charge

Between two oppositely charged parallel metal plates

None of above

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

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 angular momentum is a vector quantity with due

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Perpendicular to the axis of rotation

Along the axis of rotation

At the axis of rotation

None of these

The slope of the tangent at any point on the curve gives the value of the

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average velocity at that point

instantaneous velocity at that point

average acceleration at that point

instantaneous acceleration at that point

The original source of biomass energy is

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Moon

Sun

Geothermal

None of these

Bulk modulus for mercury is

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27

29

29.4

30

Electric field lines emerge the charges in

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One dimension

Two dimensions

Three dimensions

None of these

Conventionally, clock-wise torque is taken as

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Negative

Positive

Zero

None of these

A collision is an elastic collision in which

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Momentum and K.E. is conserved

Momentum is conserved and K.E. is not conserved

Momentum is not conserved and K.E. is conserved

None of these

If the line of action of force passes through the pivot point then the torque produced will be

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maximum

zero

minimum

none of them

The bending of light when it passes from one medium to another is known as

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Refraction

Interference

Polarization

Diffraction

Thermal radiations are a type of:

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Mechanical waves

Electromagnetic waves

Alpha rays

Electrons

At certain speed, the time taken by light in moving from M to m and back to M is equal to the time taken by

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Face 4 to 1

Fact 6 to 1

Face 3 to 1

Face 2 to 1

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