Question # 1

The effective resistance in an A.C. circuit is

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An inductance

An impedance

A mutual inductance

Always zero

What is world's average surface air temperature.

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5 ^oC

10^oC

15 ^oC

20 ^oC

A person of height 1.5 m stands 2.0 m in front of a plane mirror How far from the person is her image .

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2.0 m

3.0 m

3.5 m

4.0 m

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

Difference in the density of two medium when waves are passing from one into another medium always results in the change in.

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Wave speed

Wave direction

Both speed and direction

Wave frquency

Velocity of sound in any medium deepness upon.

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Elasticity

Density

Volume

Mass

Which Muslim Scientist is regarded as father of optics.

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Ibn al Haithem

Al khawarizmi

Nasir al Din Al tusi

Ibn Musa al khawarzmi

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

The rest mass of a particle is independent of the

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Wavelength of the particle

Mass of the particle

Speed of the particle

Energy of the particle

The basic quantity used to describe the state of magnetization of a substance is the

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Magnetic strength

Magnetic susceptibility

Magnetic moment

Magnetic moment per unit volume

Michelson's interferometer can b e sued to find

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Velocity of light

Velocity of sound

Wavelength of light

Wavelength of sound

If the roads are not banked

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A vehicle will turn over

A vehicle will not travel along with curve

Tyres and bearing are damaged

Roads will be spoiled

Lissajou's figures are used in a Cathode Ray Oscilloscope while measuring.

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Time period

Frequency

Voltage gain

phase angle

The electric field intensity of a point charge varies.

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Directly as the square of the distance from the charge

Directly as the square of the charge

Inversely as teh distance from the charge.

Inversely as the square of the distance from the charge

If the temperature of the source and sink are increased by same amount the efficiency of the engine.

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Increases

Decreases

Remains unchanged

May increases of decrease

When stationary waves are formed in a closed organ pipe.

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A node is formed at the closed end of the pipe

An antinode is formed at the closed end of the pipe

Each particle at the node experience zero acceleration

The maximum pressure occurs at the nodes

The phenomenon of regular refraction of light illustrates taht.

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Light is reflected in one direction only

Light is reflected through a range of different angles

Light is refracted in one direction only

Light is refracted through a range of different angles.

A spring obeying Hooke's law has an upstretched length 50 mm and a spring constant of 400 N m-1 What is the tension in the spriing when its overall length is 70 mm.

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8 N

28 N

160 N

400 N

One weber is equal to.

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N A-1

N m-1 A

N mA-1

N m-1 A-1

The special theory of relativity was presented in .

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1905

1909

1911

1919

Which kind of motion is exhibited by molecules of monoatomic gas.

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Rotatory

Vibratory

Translatory

Random

The first artificially produced nuclear transmutation was accomplished by.

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Curie

Rutherford

Becquerel

Chadwick

The perpendicular distance between the line of action of forces and the axis of rotation

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Torque

Moment arm

Moment of force

Momentum

Which of the following is not a ferromagnetic materials.

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Iron

steel

Copper

Cobalt

A heat engine can develop efficiency equal to 100% if the temperature of the sink is

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Less than that of source

Equal to that of source

0 K

0 ^oC

Which of the following is a transport optical element with flat polished surfaces that refract light.

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Monocole

Axicon

Prism

Lens

In case of a convex lens, when object is placed at F

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the image is formed beyond 2 F

the image is formed between F and 2 F

No image is formed

the image is formed behind the object

A tin film of liquid is enclosed between two glass plates it is difficult to spates the plates on account of.

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Surface tension

Atmospheric pressure

Viscosity

Friction

A bi convex lens of a material of refractive index 1.5 has the radius of curvature of each side equal to 50 cm the power of the lens will be.

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0.5 dipotre

1.0 dioptre

1.5 diopter

2.0dioptre

operation of a LASER depends upon

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Spontaneous emission of radiation

The existence emission of radiation

The existence of atoms in normal state

The existence of atoms in metastable state

A type of resistor whose resistance varies significantly with temperature is.

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Thermistor

Thermocouple

Strain gauge

Potentiometer

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