Question # 1

A heat sensitive resistor is called.

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Thermistor

Varibale resistor

Fixed resistor

Zero resistor

For an electron or position the rest mass energy is equal to.

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

What is the internal energy of a mono atomic ideal gas.

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Potential only

Parity kinetic and parity potential

Kinetic only

Neither kinetic nor potential

Which quantity is common for systems in thermal equilibrium.

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Heat

Temperature

Momentum

Specific heat

An ideal engine can be 100% efficient only if its exhaust temperatute.

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Equal to input temperature

Less than is input temperature

More than its input temperature

0 ^oC

The measure of how strongly a material oppose the flow of electrical current is known as

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Electrical resistivity

Specific electrical resistivity

Volume resistivity

All of the above

In Compton's effect the change in wavelength of a scattered photon is called.

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Angle of emergence

Angle of refraction

Angle of deviation

Compton shift

X-rays used for

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Cutting boring and precision welding

Retina stitching in eye operations

Detecting heavy elements under the earth

Deflecting flaws in welding and casting

Which of the following factor will not affect the speed of sound i a medium.

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Temperature

Pressure

Humidity

Mass

A body is equilibrium may not have

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Momentum

Velocity

acceleration

K.E.

When we look at the sky during daytime the light that we see is sunlight that has been absorbed and then re radiated in different directions, This process is called.

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Scattering

Diffusion

Mirage

Rainbow

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

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Electrons

Protons

Neutrons

Alpha particles

When a person holding a pall is moving in the forward direction, the work done on the pall is

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Positive

Negative

Zero

Equal to gravity

Light year is a unit of

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Light

Velocity

Time

Distance

To measure the accurate value of potential difference across two points, the voltmeter should have.

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Zero resistance

small resistance

Large resistance

Infinite resitance

Monochromatic ight is of single.

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Frequency

Wave length

Amplitude

Pitch

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

The acceleration due to gravity

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Has the same value everywhere in space

Has the same value every where on the earth

varix with altitude on the earth

Is great her on the moon owing to its smaller diameter

What is shapes of a pure note

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Sinwave

Sawtooth

Square wave

Triangular wave

X-rays are absorbed maximum by

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Paper

Copper

Steel

Lead

The first measurement of the force between electric charges was made in.

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1684

1784

1864

1874

The critical mass of fissionable uranium -235 can be reduced by

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Adding impurities to it

Heating the material

surrounding it by neutron reflecting material

Surrounding it by neutron absorbing material

Two pure inductors each of self inductance L are connected in parallel The total inductance of the combination is.

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L

2L

L/2

L/4

Efficiency of a Carnot engine depends on

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Temperature

Pressure

Volume

The nature of working substance

Which part of a simple D.C. motor reverses the direction of current through the coil every half cycle.

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the armature

The commutator

the brushes

The slip rings

Materials that experience a force from stronger to weaker regions of magnetic field are called.

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Non magnetic

Paramagnetic

Ferromagnetic

Diamagnetic

Which incapability of the materials is represented by the phenomenon of hysteresis.

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Magnetic saturation

Low susceptibility

Retrace the path

Orientation

The process in which pressure of the system remains constant.

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Isothermal process

Isochoric process

Isobaric process

Adiabatic process

The total energy of a body executing SHM is directly proportional to

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The amplitude

The square of the amplitude

Square root of the amplitude

Reciprocal of the amplitude

The permeability of a diamagnetic material is

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Greater than unity

Less than unity

Equal to unity

Zero

X-rays are good for imagining

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Tendons

Brain

Bones

Heart

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