Question # 1

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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300°C

573°C

600°C

743°C

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

The distance travelled byα-particle in a medium before coming to rest, is called

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range ofγ-particle

range of neutrons

range of particle

none of these

Which one of the following is correct?

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V_o= 1.414 V_rms

I_ams= 1.414 I_o

VO = 10.70 Vrms

Both a and b

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 kg

3 kg

4 kg

8 kg

There are some whose resistivity becomes zero below a certain temperature, called

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absolute zero

0°C

critical temperature

lower fixed point

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

The SI unit of electric field intensity is

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CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

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F=IB/L

F= L x B/I

F = IL x B

F = IL . B

In case of an ideal gas, the P.E associated with its molecule is

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maximum

zero

minimum

not fixed

In the thin film, the path difference between the two reflecting waves depends upon

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thickness of film

nature of film

angle of incidence

all of them

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

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Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

The Hook's law defines

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Modulus of elasticity

Stress

Strain

Elastic limit

Tick which of the following is not state variable:

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Heat energy

Pressure

Entropy

Volume

If d is the displacement of the body in time t, the its average velocity will be

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v_av= _{d x t}

v_av= t/d

v_av= d/t

v_{av = d/t}

The fluid which is incompressible and non viscous is called

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Ideal fluid

Non ideal fluid

Perfect fluid

All

Curie is the unit of

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decay constant

activity

half-life

average life

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

not completely filled and play active part in conduction process

not completely filled and play no part in conduction process

Biomass is a potential source of renewable energy. This includes all the organic material such as

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Crop residue

Natural vegetation

Animal dung

All of these

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

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