Question # 1

Density of water is:

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100 kgm^-3

1000 kgm^-3

10 kgm^-3

1 kgm^-3

Matter has basically ___________ states.

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4

3

Both a & b

None

The unit of kinetic energy is:

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J

N

Km

Pa

Value of g increases with the

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Increases in mass of the body

Increase in altitude

Decreases in altitude

None of the above

Independent quantities are taken on

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- x - axis

x -axis

-y-axis

y-axis

SI unit of work is:

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Joule

Coulomb

Ampere

Kelvin

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and radiation

Gravitational constant depends on:

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Medium

Force

Weight

It does not depend son anything

Einstein mass energy equation is:

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E= mc²

E= m²c

E = 1/2 mc²

2 mc²

Orbital velocity v_o =

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√gR

√RG

gR

gR²

Product of mass and velocity of a body is called.

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Torque

Force

Work

Momentum

Resistance of conductor is directly proportional to:

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Length

Pressure

Area

All of these

Coaxial cable are used to transmit signals:

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Magnet

Electric

Mechanical

Both mechanical and magnet

The quantities, whose values remain constant or vary continuously are called.

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Analogue quantities

Digital quantities

Maximum quantities

Minimum quantities.

Mathematical formula of sound level (in bel) is:

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S.L = 10 log I/Io (bel)

S.L = K log I/Io (bel)

S.L = Log I/Io (bel)

S.L = 10 log Io/I (bel)

Which of the following quantities is not change during refraction of light:

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Its direction

Its speed

Its frequency

Its wavelength

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

Electric intensity is a quantity.

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Scalar

Vector

Base

None of these

What is fitted in telephone receiver:

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Electromagnet

Diaphragm

Both a and b

None

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

Time period of simple pendulum only depends on

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Mass

Amplitude

Density

Length

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

The amplitude of a vibrating body at resonance in vacuum is

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Minimum

Maximum

Zero

Infinite

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

Dark fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Internal frame is a frame is which

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1st law holds

2nd law holds

3rd law holds

Kelvin's law holds

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

If magnetic field is doubled then magnetic energy density becomes.

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Four times

Two times

Three times

Six times

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

Number of electros emitted in photo electric effect depend upon.

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Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

The most refined form of matter is:

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Smoke

Light

Ice

Fog

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

For normal transistor the emitter current can be given by

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I_E = I_C

I_E = I_C + I_B

I_E = I_B

None of these