Question # 1

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

The SI unit of permitivity is

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Nm²C²

N^-1m^-2C²

NmC²

Nm²C^-1

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

In the force applied to parallel to the direction of motion, then the work done is:

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Positive

Negative

Zero

None of these

In compressional wave,the layer of medium having reduced pressure is called:

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Compression

Elasticity

Node

Rarefaction

The energy of the 4th orbit in hydrogen atom is

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2.5 ev

- 3.5 ev

-0.85 ev

-13.6 ev

By CAT scans, we can detect the density difference of the order of:

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1%

20%

30%

50%

70%

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

The device in which induced emf is statically induced emf is:

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Transformer

AC generator

Alternator

Dynamo

The photon of radio-waves has energy of about

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1 Me V

1 Ke v

10^-10e v

10¹⁰e v

Which of the following correctly states the base units of weight?

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N

N m s^-2

Kg m s^-1

Kg m s^-2

The young s modulus for a perfect rigid body is

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Zero

1

Infinite

None of these

The direction of the acceleration is the same as that of

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Displacement

Velocity

Both

None of these

One mole of (NH₄)₂HOP_{4 contains _ moles of hydrogen atoms:}

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1

5

6

9

At terminal velocity the net force acting on it is

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Maximum

Minimum

Zero

None of these

Inkjet printer can produce

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Black and white copy

Coloured copy

Both

None of these

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper

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The upper half of the image is cut off

The brightness of the image is reduce

The brightness of the image is increased

Lower half of the image is cut off

Light year is the unit of

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Speed

Mass

Distnace

Time

A proton is about 1840 times heavier than an electron When it is accelerated by a potential difference of 1 kV,its kinetic energy will be:

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1840 keV

1/1840 keV

1 keV

920 keV

The substances in which, atom are so oriented that their field support each other and the atoms behave like tiny magnets, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The dimensional formula for the modulus of elasticity is same as that for:

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Stress

Strain

Velocity

Surface tension

The orbital radius as the revolving body is revolving is

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Very Smaller

Larger

Smaller

None of these

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