Question # 1

A mass of 5kg moves with an acceleration of 10m s^-2force applied is

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10N

50N

2N

20N

If the velocity time graph is a straight line parallel to time-axis, then it means that:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of above

The analysis of fluid motion becomes simplified by using

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law of conservation

law of conservation of energy

both of them

none of them

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

Pressure exerted by a gas on the walls of its container in due to

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adhesion between the gas molecules and the container

cohesion between the gas molecules and the container

collision between the gas molecules and the container

surface tension of the gas

The mass of fluid passing through any cross-section per unit time is called

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electric flux

magnetic flux

mass flux

none of them

Which quantity has different dimension?

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Tension

Work

Energy

Torque

Radioactivity is

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self disruptive activity

spontaneous activity

exhibited by all elements under proper conditions

both 'a' and 'b'

In the formula R = N x m for diffraction grating, N denotes:

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No. of lines/cm

No. of lines/meter

Total number of lines

None of above

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

Light is a type of energy which produces sensation of

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Sound

Feeling

Vision

None of these

A straight current carrying conductor experiences maximum forces in a uniform magnetic field when it is placed:

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Parallel to the field

Perpendicular o the field

At an angle of 45 to the field

None of these

Negative and positive charge in a hollow sphere are equal in the number then flux from the surface will be

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Zero

Positive

Negative

Flux will be both negative and positive

If a force acts on a body whose action line does not pass through its centre of gravity.then the body will experience

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Angular acceleration

Linear acceleration

No acceleration

None of these

Electric field lines emerge the charges in

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One dimension

Two dimensions

Three dimensions

None of these

Wavelength of X-rays falling at glace angle 30° on crystal with atomic spacing 2 x 10^-9m for the first order diffraction is

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4 x 10^-6m

2 x 10^-10m

0.2 x 10^-10m

20 x 10^-10m

The displacement coincides with the path of motion when a body moves along a

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Straight line

Curved path

Zig Zag path

None of these

When a silicon crystal is doped with a pentavalent element, then the atom of the pentavalent element is known as

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acceptor

donor

either of them

none of them

De-Broglie received the Nobel prize in

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1929

1937

1928

1924

The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 − 𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:

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90, 238

91, 234

92, 236

92, 238

Newtons first law of motion says a body will

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Remains at rest

Continuous move to with uniform velocity

Have no unbalanced external force act

All of these

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