Question # 1

If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be

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turbulent

streamline

abrupt

none of them

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

When the atomic particle are moving with velocities approaching that of light:

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Newton's laws become valid

Relativistic effects become prominent

Botha(A) and (B) are valid

Neither (A)nor (B)

There mass becomes zero.

According to Stoke's law, drag force depends on

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Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

The molecules or ions in a crystalline solids are

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static

not static

randomly moving

all of them

The nature of capacity of electrostatic capacitor depends on

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Shape

Size

Thickness of plates

Area

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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number of photoelectrons

size of the photoelectrons

charge on photoelectrons

K.E of photoelectrons

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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2 R

R

R/2

R/4

The maximum range of the projectile is the horizontal distance covered is

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Maximum

Distance

Minimum

None of these

If rope of lift breaks suddenly,The tension exerted by the surface of lift is (a = Acceleration of lift)

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mg

m (g + a)

m (g - a)

0

Which of the fluid has ideal behaviour at low speeds

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Air

Blood

Honey

None of these

Which property of waves proves that light is a transverse wave?

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diffraction

interference

polarization

reflection

The momentum of a body is p and its kinetic energy is E its momentum become 2p its kinetic energy will be

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E/2

3E

2E

4E

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15 m is

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9 x 10⁵ V

9 V

8 x 10⁶ V

80 V

The internal energy is similar to the

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Gravitational potential energy

Kinetic energy

Mechanical energy

None of these

A fly is sitting on the objective of a telescope pointed towards the moons what effect is impacted in a photograph of the moon taken through the telescope

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The entire field of vision is blocked

There is image of the fly on the photograph

There is no effect at all

There is the reduction in intensity of the image

A fly wheel of moment of inertia 500 kgm²is rotating at angular speed of 6 rad/s. What torque is needed to stop wheel in 3s

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500 Nm

1000 Nm

1500 Nm

2000 Nm

A stone is dropped from rest from the top of a tower 19.6m high.The distance traveled during the last second of its fall is (giving g = 9.8 m/s²)

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9.8 m

14.7 m

4.9 m

19.6 m

The rate at which the battery is supplying the electrical energy is the:

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Power output

Electrical power

Power input

Both A and C

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