Question # 1

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

The SI unit of magnetic induction is tesla which is equal to

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Newton/ampere-meter or N/A-m

Newton/ampere²-meter or N/A²-m

Newton/ampere²-meter² or N/A²-m²

Newton/ampere²-meter²or N/A²-m²

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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Increase

Decrease

May increase or decrease

Remain the same

If both the inputs given to a gate ae 1 such that the output is 0, then it is:

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AND gate

NOR gate

OR gate

NOT gate

Both (A) and (C)

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

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2 : 1

4 : 1

1 : 4

3 : 4

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

During the nuclear changes, the law/s of conservation that hold/s are that of:

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Charge

energy

Momentum

Mass

All of these

Photoelectric effect takes place with a photon of:

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Very high energy

Very low energy

Low energy

High energy

None of these

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

A full-scale deflection is obtained in a galvanometer with a current of few

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ampere

volts

milliampere

ohm

At high altitude the blood oozes out of the nose and ear because

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The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decreases

The density of blood decrease at high altitudes

If the water exists from the pipe at the rate 1.5 kgs^-1 at speed of 0.3 ms^-1. If the water strikes a wall normally, find the force on the wall is

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5.53 N

5.03 N

1.35 N

0.45 N

A Gaussian surface is always an imaginary

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Open surface

Closed surface

Both

None of these

In a soft iron, domains are

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easily oriented along external field and do not return to original random positions

easily oriented along external field and readily returns to originally random positions

do not oriented along external field and also do not returns to original random position

none of them

De-Broglie received the Nobel prize in

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1929

1937

1928

1924

Alexander graham bell transmits a voice message via a

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Beam of light

Telescope

Compound microscope

Mirror

The rain drop falling from the sky reach the ground with

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Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

Acceleration greater than g

In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is

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1 x 10^-7m

2 x 10^-7m

1.5 x 10^-7m

1 x 10^-8m

In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width:

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Becomes doubled

Becomes 4 times

Is halved

Remains the same

For a body moving with constant speed in a horizontal circle,which of the following remains constant?

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Velocity

Centripetal force

Acceleration

Kinetic energy

A fly wheel of moment of inertia 500 kgm² is rotating at a angular speed of 6 rad s^-1. What torque is need to stop the wheel in 3 sec ?

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500 Nm

100 Nm

1500 Nm

2000 Nm

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