Question # 1

Barometer was first set up by:

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Robert

Torricelli

Al Razi

Nil

Which types of friction of maximum

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Sliding

Rolling

Both a and b

None

Latent heat of fusion of water is:

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3.36 x 10¹⁰ Jkg^-1

93.6 x 10¹⁰Jkg^-1

3.36 x 10⁵Jkg^-1

None of these

The Celsius lower reference point is 0^oC while upper reference point is:

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212 ^oC

180^oC

100^oC

110^oC

The force acting on unit area at surface of a body is called:

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Strain

Elasticity

Force

Stress

The radius R of Earth is

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6.4 x 106 m

6.4 x 108 m

6.4 x 1010 m

6.4 x 1012 m

Normal human body temperature is

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15oC

37oC

37oF

98.6oC

Einstein's mass-energy equation relation is:

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E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

The acceleration of a body moving the uniform velocity is.

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Uniform

Zero

Negative

Variable

The maximum value of friction is:

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Kinetic friction

Static friction

Limiting friction

Dynamic friction

Alcohol has specific heat in Jkg^-1 K^-1 is:

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2500

4200

1000

138.6

The equivalent resistance of a parallel combination is

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equal to sum of all resistance

is greater than the largest resistance of combination

is smaller than the smallest resistance of combination

All of these

The property of substance, which opposes the flow of current through it is called.

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Resistance

Reactance

Resistivity

None of these

The symbol of atomic mass number is:

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A

X

N

Z

At room temperature, electrons cannot escape the metal surface due to ………….. of atomic nucleus:

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Repulsive forces

Attractive forces

Gravitational forces

Electromagnetic forces

Snell' law is:

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n = sin<x/sin <r

n=sin <i/sin<r

n = sin <r/sin<i

<i/<r

The distance of image from mirror is represented by:

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q

p

F

m

Radioactive isotopes present in atmosphere is

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Cobalt -60

Ph-32

Carbon -14

Carbon -20

study of charges at rest is called:

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acoustics

electrostatics

electronics

electricity

Which component is output device of computer?

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CPU

C.D

Keyboard

Monitor

Circuit breaker works on the principle of:

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Electric current

Magnetism

Electromagnetism

Electrostatics

Snell's law is stated as:

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Sin i / sin r = n1/n2

sin i / sin r = n2/n1

sin r / sin i = n2/n1

sin r / sin i = 2n2/n1

The Bragg's equation is given by

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Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

Which one of the following is into directed along the axis of rotation

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Angular acceleration

Angular momentum

Centripetal acceleration

Angular displacement

The Carnot cycle can be shown by which graph

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P - T graph

P - V Graph

V- T graph

PV -T graph

The unit of work in base unit is

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Kg m-1 sec-2

Kgm sec-2

Kgm2 sec-1

Kgm-1 sec-1

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

Reflecting mirrors in laser is used to

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Further stimulation

For producing more energetic lasers

Both (a) and (b)

None of these

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

Ampere second stands for the unit of.

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Charge

emf

energy

Power

All motions are

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Absolute

Uniform

Relative

Variable

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

The number of crystal system are

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Three

Five

Seven

Fifteen