Question # 1

Gas constant per molecule is called:

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Universal gas constant

Stefen's constant

Boltzmann constant

Gravitation constant

A succession of events which bring the system back to its initial condition is called

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reversible process

irreversible process

a cycle

none of them

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

When the atomic particle are moving with velocities approaching that of light:

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Newton's laws become valid

Relativistic effects become prominent

Botha(A) and (B) are valid

Neither (A)nor (B)

There mass becomes zero.

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

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photo diode

light emitting diode

photo voltaic cell

all of them

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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number of photoelectrons

size of the photoelectrons

charge on photoelectrons

K.E of photoelectrons

We cannot utilize the heat contents of oceans and atmosphere because

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there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

Which of the following statements for an object in equilibrium is not true?

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The object must be at rest

The object can be at rest

The object is moving at constant speed

The acceleration of the object is zero

A typical rocket consumes about

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100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

Which one of the following is an example of SHM

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Motion in a plane

Motion in a swing

Motion in a car

None of these

What are the base units of Planks constant h Remember the energy of a photon is given by hf where f element the frequency

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kgms^-1

kgm²s^-1

kgm²s^-2

kgm²s^-3

When interference of light takes place

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Energy is created in the region of maximum intensity

Energy is destroyed in region of maximum intensity

Conservation of energy hold goods and energy is redistributed

Conservation of energy does not hold good

Gauss s law in electrostatics is true when the charges enclosed in Gaussian surface are

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Stationary only

Moving only

Moving or stationary

None of these

In the following velocity time graph,the distance traveled by the body in meters is

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200

250

300

400

Stoke's law holds for bodies of the shape

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Spherical

Rectangular

Oblog

All of these

A gas which strictly obeys the gas laws under all conditions of temperatures and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

The numerical values of the ratio of displacement to the distance is

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Always less than one

Always equal to one

Always more than one

Equal to or less than one

Two wires of the same material have diameters in the ration 2 : 1 if they are stretched by the same force their elongations will be in the ratio

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8 : 1

1 : 8

2 : 1

1 : 4

The range of projectile is 50 m when θ is inclined with horizontal at 15° what is the range when θ becomes 45°?

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400 m

300 m

200 m

100 m

The approximate efficiency of incandescent lamp is

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6%

8%

5%

9%

Which one of the following is nearly monochromatic

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Light from candle

Light from simple lamp

Light from sodium lamp

Light from sun

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