Question # 1

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

In AND gate, the output is 1 if:

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Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

In above figures, tell which set of graphs shows that a body is moving with uniform velocity:

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(i) and (ii)

(ii) and (iii)

(iii) and (iv)

The ratio of linear stress/linear strain is called as

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Yong's modulus

Bulk modulus

Shear modulus

Modulus

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

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Remains constant

Decreases

Increases

Reduces to zero

Semi-conductor elements have atoms with

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2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

Radioactivity was discovered by:

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Becquerel

Marie curie

Pierre curie

All of them

None of these

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

The un-steady streamline flow is called

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laminar flow

turbulent flow

both of them

none of them

The low blood pressure is known as

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Diastolic

Systolic

Low blood pressure

None of these

If the direction of force acting on a body capable of rotating about a point is reversed than

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Magnitude of torque changes and direction remains same

Magnitude of torque changes and direction is reversed

Magnitude and direction both changes

Magnitude of torque remains same and direction is reversed

A physical quantity which has both magnitude and direction but does not satisfies parallelogram law of addition

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Must be a vector

May be both scalar and vector

Scalar

None

A highly irreversible process is

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Expansion

Explosion

Compression

None of these

Star twinkle due to

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The fact that they do not emit light continously

The refractive index of earth's atmosphere fluntuates

The star's atmosphere absorbs its light intermittently

None of these

In electromagnetic waves electric and magnetic field ar

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Parallel

Antiparallel

Perpendicular

Sometimes parallel sometimes perpendicular

Base quantities are

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Scalars

Vectors

Both

None of these

Acceleration increases ______ when rain drop starts to fall

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Very fast

Gradually

Very slow

No increase

The law of conservation is important in many sport like

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Diving

Gymnastics

Ice-skating

All of these

The length of a telescope is 36 cm.The focal lengths of its lenses can be

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30 cm,6 cm

-30 cm,-6 cm

30 cm,-6 cm

-30 cm,-6 cm

When the vectors are mutually perpendicular then the product is

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Maximum

Minimum

Zero

None of these

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