Question # 1

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 diameter of an atom is of the order

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10^-125m

10^-11m

10^-10m

10^-9m

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

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Mechanical waves

Electromagnetic waves

Matter waves

All of them

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

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2100 m/s²

1400 m/s²

700 m/s²

400 m/s²

A grating with high resolving power can distinguish _______ difference in wavelengths :

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Smaller

Larger

Zero

None of these

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

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2 cm/s

20 cm/s

200 cm/s

2000 cm/s

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluids

None of these

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

Gamma rays consist of steam of

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electron

proton

photons

all of these

The unit of spring constant is

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J-sec

Metre

Nm^-1

None of these

The doped semi-conductor materials are known as

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intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

Which one is the least multiple:

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Pico

Femto

Nano

Atto

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. The angle which the force makes the direction of motion will be:

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60°

90°

30°

0°

Total number of base units are

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Three

Five

Seven

Nine

N s m^-2is unit of:

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Drag force

Pressure

Surface tension

Coefficient of viscosity

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

The value of the metastable state for Neon is

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20.66eV

20.61eV

19.23eV

18.70eV

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

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Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

The information from far side of the universe are gathered by

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Radio telescope

Microscope

Telescope

Spectro scpe

With increase of temperature, the viscosity of liquid and gases

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Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

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1900

1906

1912

1918

The measure of the deformation in a solid when stress is applied to its is called

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elastic constant

young's modulus

strain

elasticity

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

The obvious effect/s of current is/are:

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Heating effect

Magnetic effect

Chemical effect

Both (C) and (B)

All of these

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