Question # 1

The horizontal component of a projectile moving with initial velocity of 500 ms^-1at an angle 60° to x-axis is

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500 ms^-1

1000 ms^-1

250 ms^-1

Zero

The root mean square voltage for alternating current is

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All of these

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

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5.07 pF

50 pF

0.507 pF

507 pF

First law of thermodynamics is consequence of conservation of

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Work

Energy

Heat

All of these

The value of LDR depends upon intensity of:

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Sound falling on it

Current passing through it

Magnetic field surrounding it

Light falling on it

Non of these

The branch of physics which deals with the structure and properties of solids is called:

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Plasma physics

Solid state physics

Any of above

Astrophysics

In an adiabatic expansion, the temperature of the gas

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increases

becomes zero

decreases

decreases rapidly

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

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Zero

Infinity

V

2 V

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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Q=V/C

Q=C/V

Q=1/2CV

Q=CV

Mathematical manipulation of the two quantized states can be best carried if they are represented by

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high - low

yes - no

on - off

0 - 1

The dimensions of torque are

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ML²T^-2

MLT²

MLT^-1

ML²T²

At high altitude the blood flows out of nose and ear because

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The blood pressure increases at high altitudes

The percentage of oxygen in the air increases

The atmospheric pressure decreases there

The density of blood decreases at high altitudes

Young's modulus for concrete is

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10

15

25

30

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

220 cm³of water, when subjected to a stress of 100 atmosphere, becomes 219 cm³. Find the bulk modulus of water

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100 N m^-3

100 N m^-2

22000 N m^-3

22000 N m^-2

Michelsion devised the Michelson's interferometer in

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1981

1891

1851

1881

Microwaves are used because they travel in a

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Narrow beam

Straight line

Easily pass through Earth atmosphere

All of these

The property of light which makes light possible to be transmitted into inaccessible place is

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Interference

Diffraction

Polarization

None of these

The slope of velocity-time graph gives

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Distance

Area

Acceleration

Speed

In closed end organ pipe, the frequency of first harmonic is 300 Hz. The frequency ofthird overtone is :

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900 Hz

1500 Hz

2100 Hz

600 Hz

When two lights waves travelling in the same direction are in phase at any point, they producing

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constructive interference

destructive interference

dispersion

polarization

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