Question # 1

If the objects of different masses move with the same velocity, then it is more difficult to stop the

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lighter of the two

massive of the two

any one of them

both of them

One coulomb per second is equal to

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One volt

One ampere

One hom

One henry

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

In the doping process, the ratio of the doping atoms to the semi conductor atom is

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1 to 10

1 to 10³

1 to 10⁶

1 to 10⁹

The strength of magnetic field at certain points around a wire depends upon:

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Value of current passing

Distance from the current element

Color of the material

Both (A) and (B)

Both (B) and (C)

The current through a metallic conductor is due to the motion of

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protons

neutrons

electrons

free electrons

Momentum is a parameter associated with

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wave motion

particle motion

neither wave nor particle motion

none of these

A man is an elevator descending with acceleration will conclude his weight has

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Increase

Decrease

Remain constant

Become zero

Which quantity has the same units as impulse?

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force

work

linear momentum

acceleration

A train us moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction The relative velocity of train with respect to car is

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17 m/s

33 m/s

17.5 m/s

None

The minimum number of lenses used in compound microscope is

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1

2

3

4

Weightlessness experienced by the spaceship is due to

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Absence of gravity

Absence of inertia

Free fall of spaceship

All of these

A body is subjected to a force such that its velocity is doubled then

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Its acceleration is also doubled

Its momentum is also doubled

Its potential energy is also doubled

Its kinetic energy is also doubled

When torque acting upon a system is zero which of the following will be constant?

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Force

Linear momentum

Linear impluse

None of these

The ratio of electro static force to the gravitational force between them is of the order of

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10³⁶

10³⁸

10⁴⁰

10⁴²

In Compton effect, it was considered that X-rays consist of:

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Electrons

Positrons

Photons

All of these

How many wavelengths of Kr⁸⁶ are these in one metre?

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1553164.13

1650763.73

2348123.73

652189.63

A body will be in translation equilibrium only if the vector sum of all the external forces acting on a body is equal to

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Unity

Zero

Maximum

Double

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