Question # 1

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

The basis to define a temperature scale that is independent of material properties is provided by

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carbon cycle

nitrogen cycle

Carnot cycle

irreversible cycle

In half wave rectification

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both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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Time constant

Decay constant

None of these

All of above

The device which can convert heat energy into electrical energy is called:

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Thermistor

Thermometer

Thermostat

Thermocouple

Both (C) and (D)

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90° with each other is:

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20 m/sec

5 m/sec

3 m.sec

None of these

The smallest three dimensional basic structure in a crystalline solid is called

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lattice point

crystal lattice

cubic crystal

unit cell

The half life of uranium-238 is

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6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

A piece of copper and another of germinium are cooled from room temperature to 80K. The resistance of

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Each of them increases

Each of them decreases

Copper increases and germanium for

Copper decreases and germanium increases

An object is placed at a distance 18 cm from a convex lens. The image is formed at a distance of 9 cm the focal length of the lens is

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6 cm

9 cm

10 cm

18 cm

We can observe only when the grating spacing is

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of the order of the wavelength used

greater than the wavelength used

less than the wavelength used

any one of them

Young's modulus for glass is

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15

35

39

55

When relatively simple molecules are chemically combined into massive molecules, the reaction is called:

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Fission reaction

Fusion reaction

Polymerization reaction

Any of these

None of these

Huygen's principle is used to study the

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formation of wavefronts

propagation of wavefronts

nature of light

speed of light

In normal adjustment, the length of the telescope is

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f_e + f_o

f_o - f_e

f_e - f_o

None of these

The dimensional formula for the modulus of elasticity is same as that for:

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Stress

Strain

Velocity

Surface tension

A light and a heavy body have equal momentum which one has greater kinetic energy

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Light body

Both has equal K.E

Heavy body

Cannot predict

All changes which occur suddenly are irreversible through

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Conduction

Convection

Radiation

All of these

Cladding in an optical fiber is used to

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Absorb unneccessary light

Produce total internal reflection

Transmit light

Filter light

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