Question # 1

According to the equation of continuity, when water falls from the tap, it's speed increases and its cross-sectional area

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decreases

increases

becomes zero

none of them

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

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45°

60°

50°

40°

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

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Greater than

Equal to

Smaller than

None of these

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

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60 W bulb

100 W bulb

Both equally

None of these

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

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Two

1/2

Zero

3/2

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

Density is defined as:

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Mass per volume

Volume per mass

Mass x volume

Mass per length

If the object is situated at focus of a convex lens, then its image is formed at:

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F

2F

Infinity

None of these

The number of protons inside a nucleus is called

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mass number

atomic weight

atomic number

none of these

We can express the work in term of

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directly measurable variables

indirectly measurable variables

either of them

both of them

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

If two non zero vectors A and B obey the relation |A + B| = |A - B|.then the angle between them is:

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120°

90°

60°

0°

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m^-2

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50 m

10 m

5 m

1 m

The dimensions [MLT^-1] refers to the quantity

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Momentum

Angular frequency

Angular displacement

Angular acceleration

An ordinary glass gradually softens into a paste-like state before it becomes a very viscous liquid. It happens almost at:

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800°C

500°C

300°C

100°C

None of these

Vectors are those physical quantities which requires

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Magnitude

Magnitude and directions

Direction

None of these

The information received at the other end of a fibre can be inaccurate due to

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dispersion of light signal

spreading of light signal

both of them

none of them

The percentage uncertainty in measuring the volume of sphere measured by calipers callipers is when r = 2.25 ± 0.01 cm with least count ± 0.01 cm

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46.7 ± 0.5 cm²

47.7 ± 0.5 cm³

47.7 ± 0.6 cm³

477.6 ± 0.6 cm³

A pulse of light in the optical fibres represents the number

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0

1

2

3

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

The terminal velocity of falling object will be proportional to

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r²

1/r²

r

1/r

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