Question # 1

When the bob of simple pendulum is at mean position, its K.E will be

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maximum

minimum

zero

all of them

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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plastic line

breaking point

proportional limit

none of them

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

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3

24

126

200

According to Huygen's principle

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light travels in straight line

Light is a transvers wave

Light has dual nature

All points on the primary wave-front are the sources of secondary wavelets

Which one of the following could be the frequency of ultraviolet radiation?

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1.0 x 10⁶Hz

1.0 x 10⁹Hz

1.0 x 10¹²Hz

1.0 x 10¹⁵Hz

Inertia mass and gravitational mass are

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opposite

identical

identical when there is no friction

all of them

If the two charges in Coulomb's law have double distance between them, then electric force

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Becomes two-fold

Becomes four-fold

Remains the same

None of these

A swing has

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one natural frequency

two natural frequencies

three natural frequencies

four natural frequencies

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

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1.24 x 10^-10m

7.92 x 10^-20m

2.78 x 10^-14m

3.88 x 10^-11m

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

The magnitude of work is zero when the angle between force and displacement is

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0^o

90^o

10^o

None of these

The motion of a body in a straight line is the motion in

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one dimension

two dimensions

three dimensions

four dimensions

A special alloy called Alnico is known as

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Soft magnetic material

Hard magnetic material

In between soft and hand magnetic material

None of these

The Earth and some other planets revolve round the Sun in

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Elliptic path

Nearly circular path

Circular path

None of these

Two lenses of power +12 and -2 diopters are placed in contact the power of combination is

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10 diopters

8 diopters

6 diopters

12 diopters

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

1 year = ______.

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3.1536 x 10⁷s

3.1536 x 10^-7s

3.1536 x 10¹⁰s

3.1536 x 10^-10s

For maximum linear distance of travel, a projectile must be fired at an angle of

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0°

45°

90°

60°

The image formed after objective lens of an astronomical telescope is

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Inverted

Diminished

Real

All of these

If g is the acceleration due to gravity on the surface of the earth, then the value of the acceleration due to gravity at height equal to R/2 from the surface of earth is (R is the radius of the earth)

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g/2

2/3 g

4/9 g

5/9 g

The modulus of rigidity of a liquid is

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Zero

1

Infinite

None of these

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