Question # 1

when the deformation produced in the material become permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

How much time, theα-particle more massive than an electron

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600

7000

5000

15000

The maximum stress that a material can withstand, is known as

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plastic point

elastic limit

yield point

ultimate tensile strength

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

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diffraction

beat

interference

resonance

The maximum possible error in the reading of an instrument is ______ its least count.

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Half of

Quarter of

Equal to

Double than

Significant figures in 0.2020 are:

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Two

Three

Four

Five

If the distance between two charges is doubled, the force between them will become

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Double

Half

Three times

One fourth

One third

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

The electric field due to an infinitely long thin wire at a distance R varies as

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1/R

1/R²

R

R²

The value of g is maximum at

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The equator

The poles

The center of earth

Between poles and equator

The initial velocity of a body moving along a straight line in 7 m/s.It has a uniform acceleration of 4 m/s².The distance covered by the body in the 5th second of its motion is

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25 m

35 m

50 m

85 m

Super conductor offers no resistance to

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Thermal agitation

Electric current

Induced current

None of these

Impulse is the force applied for a very short interval time in which force is

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Constant

Not constant

May be constant for some time

None of these

The angle between rectangular components of a vector is

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0°

60°

90°

120°

An accurate measurement is the one which has

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Percertainity

Less percentage uncertainty

Less fractional uncertainty

b and c

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

Surface area is

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Scalar

Vector

Neither scalar nor vector

Both scalar and vector

If the cover of a red book is observed in monochromatic blue light,It will appear

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White

Red

Black

Blue

Travel time of light from sun to earth is

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8 hours 20 minutes

8 minutes 20 seconds

1 minutes 20 seconds

5 hour 20 seconds

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