Question # 1

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

The basis to define a temperature scale that is independent of material properties is provided by

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carbon cycle

nitrogen cycle

Carnot cycle

irreversible cycle

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

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Adhesive force

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

Which quantity is important in stating the entropy of the system

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initial entropy

final entropy

change in entropy

none of them

Rutherford performed an experiment on nuclear reactions in:

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1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

Current is measured in

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volts

watt

ohm

ampere

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

Whenever a covalent bond breaks, it creates:

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An electron

A hole

An electron-hole pair

A positron

All of these

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^-19N, is

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25

225

625

1250

A body falls freely from rest.It covers as much distance in the last second of its motion as covered in the first three seconds.The body has fallen for a time of

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3 s

5 s

7 s

9 s

The least count of stop watch is 0.10 sec,The time of 20 vibrations of pendulum is 40 sec The maximum possible percentage uncertainly in time period is

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0.016

0.10

0.001

0.005

The typical speed of human swimming is

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1.5 ms^-1

2 ms^-1

2.5 ms^-1

3.0 ms^-1

When a body is stationary

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There is no force acting on it

The force acting on it are not in contact with it

The combination of the forces acting on it balance each other

The body is in vacuum

Two wires of same material have lengths L and 2L and cross-sectional area 4A and A respectively. the ratio of their specific resistance would be:

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1: 1

1: 8

8: 1

1: 2

The maximum drag force on a falling sphere is 9.8 N,it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

The fundamental quantities which form the base for the SI systems are:

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Mass, energy and time

Mass, force and time

Mass, length and time

Force, length and time

The resolving power of telescope depends on

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Focal length of eye lens

Focal length of objective lens

Length of the telescope

Diameter of he objective lens

Which one of the following phenomena is not explained by Huygen's construction of wavefront?

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Refraction

Reflection

Diffraction

Origin of spectra

To wavelength of light by his experiment , Newton utilized:

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Wavelength of light

Intensity of light

amplitude wave

None of above

Solid state Physics is the branch of physics deals with the

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Atoms and molecules

Structure

Properties

b and c

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