Question # 1

The device in the circuit that consume electrical energy are known as.

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Resistors

Capacitors

Fuses

Load

Efficiency of a Carnot engine depends on

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Temperature

Pressure

Volume

The nature of working substance

Slip Rings are used in

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D.C. dynamo

A.C. dynamo

Transformers

Battries

The product of cross sectional area of the pipe and the fluid velocity at any point along the pipe is equal to.

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Zero

Flow rate

A constant

A varibale

Who first studied the visible region of hydrogen spectrum.

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Lyman

Pfund

Balmer

Brackett

A capacitor is connected to a battery The fore of attraction between the plate when the separation between them is halved will

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Remain the same

Become twice

Become 4 times

Become 8 times

Rainbows and mirage are formed by

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Reflection only

Refraction only

dispersion only

A combination of refraction, total internal refraction and dispersion

A p-type material is formed then a semiconductor is doped with

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Trivalent impurity

Tetravalent impurity

All of above

A material having excess of free electrons

The effective resistance in an A.C. circuit is

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An inductance

An impedance

A mutual inductance

Always zero

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

A semiconductor diode conducts only when it is

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Not biased

Zero biased

Reverse biased

Forward and biased

Any alternations product in shape length of volume where a body is subjected to some external force is called

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Deformation

Polymerization

Crystallization

Elasticity

If the pressure of a gas is doubled, then its thermal conductivity will

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Increases

Decreases

Remain constant

Be zero

The normal Human body temperature in Fahrenheit scale is.

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32 ^oF

40 ^oF

98.4^oF

212 ^oF

When the deforming force applied on a body produces change in shape, thenit is said t be

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Tensile stress

Compression stress

Shear stress

Shear modulus

Which quantity remains fixed in isobars.

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Mass number

Atomic number

Number of neutrons

Number of protons

What are isotopes.

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Atoms of the same element with different numbers of neutrons.

Atoms of the same element with different numbers of protons.

Atoms which are radioactive

Atoms which have gained or lost an electron

As the mass number varies, which of the quantities does not change w.r.t nucleus.

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Mass

Volume

Binding energy

Density

The path of Gama rays in Wilson cloud chamber is

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Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

Light wave can be polarized because they

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Are transverse in nature

Can be reflected

Have short wavelength

Have high frequncies

It the force acting on a body is doubled its acceleration becomes.

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Half

Constant

Double

One fourth

Which property of waves is independent of the others.

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Amplitude

Velocity

Frequency

Wavelength

The most familiar example of radioactive dating is.

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Nitrogen dating

Carbon dating

Hydrogen dating

Helium dating

The resistance offered by one cubic meter of a substance is known as.

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Reactance

Conductance

Conductivity

Resistivity

Which are the two basic properties of a vector.

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Curvature and direction

Magnitude and direction

Magnitude and sign

Curvature and sign

The value of electric field intensity is.

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Volt

Coulomb

Newton

Newton coulomb

The highest value reached by the voltage or current in one cycle is its.

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Top value

Maximum value

Average value

Peak value

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

The word amorphous means

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With regular structure

Without structure

May have regular structure

Thermoplastics

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