Question # 1

Who invented commutator.

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William Sturgeon

William Smith

Michael Faraday

Mosely

The consumption of energy by a 60 W bulb in 2 s is

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0.02 J

30 J

60 J

120 J

The first demonstration of wave nature of light was provided in 1801 by the experiment of

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HHuygen

Thomas young

Fresnel

Maxwell

If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.

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cut of mode

Amplification mode

Saturation mode

Inversion mode

In CC configuration voltage gain is.

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Less than one

More than one

One

Zero

Which one of the following temperature scales is independent of the properties of any particular substance.

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Kelvin scale

Gas scale

Thermodynamic scale

Celsius scale

The concept of entropy was introduced by

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Saadi Carnot

Boyle

Charles

Rudolph Celsius

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

a 5 kg mass is falling freely the force acting on it will be.

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0 N

9.8 N

5 N

19.6 N

Electromotive force is closely related to.

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Inductance

Magnetic flux density

Potential difference

Electric field intensity

A magnetic pole

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Is made of a magnetic material

Is a factious quantity

Is defined in terms of Ampere's law

Cannot be detected

The internal resistance of a primary cell depends upon the.

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Current dawn form the cell

Concentration of the solution

distance between cell electrodes

All of the above

Which method of charging is involved in making lightning.

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Induction

Friction

Contact

Convection

When the frequency of A.C in L - C- R circuit is incrased the impedance of L-C-R circuit.

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Increase

Decrease

Remain unchanged

First decrease and then increases

In rotational motion, the analogue of force is.

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moment of inertia

Moment of force

Torque

Rotational inertia

What is the range of values of power factor.

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0 to -1

0 to +1

0 to 2

2 to 3

The sound waves used sonography are

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Less than 20 KHz

of 20 Khz

Greater than 20 KHz

Of 20 MHz

The dimensional formula for torque is identical to.

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Kinetic energy

Pressure energy

Moment of force

All of the above

Efficiency of a Carnot engine depends on

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Temperature

Pressure

Volume

The nature of working substance

A galvanometer can be converted into voltmeter by connecting in series with the galvanometer a

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Low resistance

High resistance

Resistance of intermediate range

Shunt

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

The change in entropy for any reversible cycle is identically

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Infinite

Positive

Negative

Zero

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

Image formed by a camera is

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

Usually in an operational amplifier the inputs used are of

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Equal voltage and same polarity

Equal voltage and opposite polarity

Different voltage and same polarity

Different voltage and opposite polarity

In a spectrometer experiment monochromatic light is incident normally on a diffraction gratin having 4.5 x 10⁵ lines per metre The second order line is seen at an angle of 30^o to The normal What is the wavelength of the light.

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430 nm

556 nm

589 nm

625 nm

The susceptibility of a paramagnetic material is

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negative

Positive

Zero

Infinity

An operational amplifier have how many input terminals.

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One

Two

Three

Four

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

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