Question # 1

Angular acceleration is produced due to

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Centripetal force

Torque

Force

Mass

Two magnetic lines of force

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Out near the poles

Never cut each other

Cut at a neutral point

Cut according to position of the magnet

The main advantage of step index fiber is.

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The size of the cable

The equality of the cbale

Difference in the wavelengths of signals

All of the above

On which factor the self induction does not depends upon.

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Number of turns of the coil

the core material

Weight of the coil

Area of the cross section of the coil

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

The fluid which is incompressible and non viscous is called.

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Viscous fluid

Nonideal fluid

Ideal fluid

Perfect fluid

If the wavelength of a wave is 1 cm and its period is 0.02 s , velocity of the wave will be

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20 cm s-1

50 m s-1

60 cm s-1

100 cm s-1

A slow neutron can cause fission in

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Uranium -238

Uranium-235

Hydrogen-1

Thorium -232

The strength per unit volume of a solid is called.

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shear stress

Shear strain

Bulk strength

Bulk modulus

Total internal reflection occurs when the angle of incidence is.

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Greater than the angle of refraction

Equal to the critical angle

Greater than the critical angle

Greater than 45^o

The fundamental frequency of a sound source is 256 Hz. What is the frequency of the first harmonic.

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64

128

256

512

There are how many modes of operations of a BJT.

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2

3

4

5

If two gases have same reduced pressure volume and temperature it is according to

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Boyle's law

Charles law

Law of corresponding state

Zeroth law

The current passing across a p-n junction due to minority charge carriers is called

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Reverse current

Forward current

Leakage current

Both a and b

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

A device used to determine mass of an isotope quite accurately is known as.

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Spectrometer

Mass spectrometer

Mass detector

Electronic balance

With high frequencies capacitive reactance

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Increases

Decreases

Becomes double

Becomes half

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

Sub atomic particles which experience strong nuclear force are.

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Leptons

Hadrons

Mesons

Quarks

The magnitude of resultant of three force is 3. If its x-component is 2, Y component is 1. Its 2-component will be.

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1

2

3

4

Condenser is used

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To produce charge

To change the direction of current

To collect the charge

As a good conductor of electricity

When a platinum wire is heated of 1600^oC, it becomes

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orange

Cherry red

Dull red

White

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

On which parameter, the heat capacity of a material depends upon.

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Density of the material

Specific heat of the material

Temperature of the material

Structure of the material

During solid ficain the temperature.

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Remains constant at the freezing point

Increases at the freezing point

Decreases at the freezing point

Decreases at the melting point

On loading the prong of a tuning fork with wax. Its frequency.

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Increases

Decreases

Remain unchanged

May increase or decrease

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

Which of the following proves that light waves are transverse in nature.

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Diffraction

Interference

Polarization

Refraction

Alpha particles are used for the treatment of skin of a patient due to.

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Highly ionizing power

Low penetration power

Positively charged particles

Helium nucler

In planetary motion

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Angular speed remains constant

Angular momentum remains constant

Linear speed remains constant

Linear momentum remains constant

At room temperature the p.d. between the two sides of depletion region for germanium is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

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