Question # 1

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

The nucleus/nuclei of hydrogen is/are:

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Proton

Deuteron

Triton

All of these

None of these

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

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R₁= 2R₂

R₂= 2R₁

R₂=4R₁

R₁= 4R₂

The direction of the streamlines is the same as the direction of the

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force

torque

velocity

weight

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

Op-amp has been discussed as comparator of:

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Distances

Voltages

Velocities

Magnetic fields

Both (A) and (C)

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

The cross product of parallel vectors is zero when angle between

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θ 0^o

θ = 90^o

θ = 180^o

a and c

The fluid which is incompressible and have streamline flow is called _________ fluid

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Ideal

Viscous

Non ideal

None of these

The direction of velocity is along the direction of

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Motion

Displacement

Velocity

None of these

The magnitude of torque is equal to the product of the force and the moment arm. The moment arm is

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The distance between the point and the point of the action of the force

The maximum distance between the pint and the line of action of the force

The minimum distance between the pivot point and the line of action of the force

All of these

If the angle between r and F is 90°, then the torque is

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zero

minimum

maximum

infinite

The product of pressure P and volume V of an ideal gas is

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Constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm². Find the Young's modulus for that rubber.

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0.5 N cm^-2

0.05 N cm^-2

50 N cm^-2

500 N cm^-2

The minimum number of lenses used in compound microscope is

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1

2

3

4

Newtons third law says, that the action and reactions are

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Equal but in the same direction

Equal but in opposite direction

May be unequal but in the same direction

May be unequal but in opposite direction

If Young s double slit experiment is immersed in water then the fringes with

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Decreases

Remains unchanged

Becomes infinite

Increases

The study of nature has been classified into branches are:

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Two

Three

Four

None of these

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