Question # 1

Stock's law holds for:

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Motion through free space

Motion through viscous medium

Bodies of all shapes

None of these

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

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10 m/sec2

20 m/sec2

30 m/sec2

Zero

The inkjet printer eject a thin stream of:

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Water

Oil

Ink

Any above

None of these

The closed loop gain of the non-inverting amplifier is given by

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G = R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

G = 1 + T₂/R₁

In an interference pattern of Young's double slit(YDS) experiment:

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Bright fringesare wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equal width

Central fringes are wider than the outer fringes

The natural frequency of a pendulum which is vibrating freely, depends upon its

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mass

length

material

all of them

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

The smallest three dimensional basic structure is called as:

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An atom

Unit cell

Crystal lattice

Polymer

None of these

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

As the current flows through the wire

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It generates heat in the wire

It produces sound in the wire

Resistance of the wire decrease

Voltage across the ends is the increase

None of these

The year when A.H. compton was awarded Nobel Prize is:

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1923

1927

1931

1935

None of these

In Millikan s experiment oil drops are used to measure the elementary charge e. Which statement about the behaviour of the oil drops during the experiment is correct

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When an oil drop becomes charged the size of the charge must be equal to e

When an oil drop is stationary it must carry a charge

When a oil drop moves upwards only the electric force is acting on it

When no electric field acts all drop move downwards with the same constant velocity

The magnitude of potential barrier for Ge is

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0.7 v

0.3 V

7v

3 v

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart,with force of repulsion between the spheres to be 10^-19 N,is

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25

225

625

1250

When a bicycle is in motion but not pedaled,the force of friction exerted by the ground on the two wheels is such that it acts

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In the backward direction on the front wheel and in the forward direction on the rear wheel.

In the forward direction on the front wheel and it the backward direction on the rear wheel.

In the forward direction on both the wheels.

In the backward direction on both the wheels.

If 5000 lines per cm are ruled on different on a diffraction grating then the slit spacing will be

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5 x 10^-3A°

2 x 10^-4A°

5 x 10^-5A°

2 x 10⁴A°

A gas is compressed adiabatically till its temperature is double. The ratio of its final to its initial volume is

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1/2

More than 1/2

Less than 1/2

Between 1 and 1/2

Which one of the following waves cannot be polarized

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Radio waves

X-rays

Transverse waves in a string

Longitudinal waves in a gas

Laws of reflection and refraction can also be explained by:

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Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

The ballistic missiles are useful only for

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long ranges

short ranges

medium ranges

none of them

A ballistic missile is

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Unpowered

Unguided

Both

None of these

Ordinary light has components of vibrations in

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one direction only

two directions

four directions

all directions

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