Question # 1

Which of the following can become a good permanent magnet

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iron

steel

both of them

none of them

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

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Double the size

Same size

Half the size

None of these

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

When we consider the average velocity of a body, then the body is moving in

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straight line

curved path

may be in a straight or curved path

none of them

When relatively simple molecules are chemically combined into massive molecules, the reaction is called:

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Fission reaction

Fusion reaction

Polymerization

Any of these

None of these

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

Which of the following theory completely explain the three types of materials

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Bohr model of electron distribution

Rutherford atomic model

Pauli's exclusion principle

energy band theory

Electron volt is the unit of

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Potential difference

Energy

Resistance

Capacitance

Equal charges are given to two spheres of different radii. The potential will

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Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

Cosine of an angle is positive in:

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2nd quadrant

3rd quadrant

4th quadrant

All of these

The time taken by light to travel from moon to earth is:

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80 sec

500 sec

1.802 X 10⁴sec

Aerophysics

Newton's laws are empirical laws, deduced from

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Theories

Experiments

Facts

None of these

The conversion of electrical signals into light signals taken place due to

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Generator

Transmitter

Receiver

None of these

The young's modulus of a wire of length L and radius 'r' is Y. If the length is reduced to L/2 and radius to r/2, its Young's modulus will be

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Y/2

Y

2Y

4Y

The normal human eye can focus a sharp image of an object located anywhere form infinity to a certain point called

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Far point

Near point

distant point

None of these

Rain drops are spherical because of

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Gravitational force

Surface tension

Low viscosity of water

Air resistance

In torque when the force is kept constant and the moment arm increases, then the torque

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Increases

Decreases

Remains constant

None of these

Which of the following is the only vector quantity

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Temperature

Energy

Power

Momentum

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.If the resultant is at 90° with the force of the smaller magnitude then their magnitudes are:

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3, 15

4, 14

5, 13

6, 12

Soap bubble looks colored due to

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Dispersion

Reflection

Interference

Any one of these

Fringe spacing ΔY is the distance between two adjacent bring fringes on the screen is

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ΔY = Lλ/d

ΔY = Ld/λ

ΔY = dλ/L

ΔY = Lλ/d m

Light has:

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Wave nature

Particle nature

Dual nature

None of them

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