Question # 1

A LASER beam may be used to measure very large distance because it is.

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Unidirectional

Coherent

Monochromatic

Massive

The first artificially produced nuclear transmutation was accomplished by.

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Curie

Rutherford

Becquerel

Chadwick

An inductor may store energy in

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Its magnetic field

Its electric field

Its coils

A neighboring circuit

A bus and a car moving with the same K.E. are acted upon by the same retarding force then the

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car will stop first

Bus will stop first

Both will stop simultaneously

Both will never stop

The locus of all points in a medium having the same phase of vibration is called.

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Creast

trough

Wavelength

Wave front

Solar cells are thin sand whishes of

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good conductors

Bad conductors

Semi conductor

Insulators

The distribution of electrical charge i an object caused by teh influence of nearby charges is called.

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Electric potential

Electrostatic induction

Electric flux

Electric dipole moment

When ever current is drawn from a cell Its terminal potential difference and emf become

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Different

Same

Zero

Negative

A straight copper wire a moved in a uniform magnetic field such that it cuts the magnetic lines of force then.

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emf will not be induced

emf will beinduced

sometimes emf will be induced and sometimes not

The number of turns iin the coil increases

Which of the following has maximum specific heat.

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Glass

Iron

Brass

Lead

In a resistor, when base width decreases with increasing Vbc, this phenomenon is called.

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Tunneling

Thermal runway

Pinch off

Early effect

What is the human body temperature in Celsius scale.

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30 oc

36. 9 oC

98. 4 oC

100 oC

The unit of Rydberg constant R is

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m

m3

m^-1

m-2

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

When a following field is governed by Maxwell's equations.

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Electrodynamics

Optics

electric circuits

All of these

A wave source of frequency 1000 Hz emits waves of wavelength 0.1 m How long does is take for the waves to travel 2500 m.

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20 s

25 s

40 s

100 s

The band of colours is called.

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Spectrum

Prism

Medley

LASER

The circuit of full wave rectification consists of

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Only one diode

Two diodes

Three diodes

Four diodes

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

A dry battery can deliver 3,000 J energy to a small 2 W electric motor before the battery is exhausted for how minutes does the motor run.

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20 minutes

25 minutes

75 minutes

125 minutes

Which of the following is a method of energy transfer.

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Conduction

Wave motion

Radiation

All of these

High frequency radio wave is called

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Fluctuate wave

Carrier wave

Matre wave

Energetic wave

The first super conductor was discovered by

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Faraday

Lenz

Kamaerlingh Ornes

Oersted

Which of the following pair of physical quantities have the same dimension.

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Momentum and pressure

Energy and work

Linear and angular momentum

Force and surface tenstion

The SI unit of radioactivity is.

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Becquerl

Curie

Joule

rutherford

Which of the following is used for the failure of a lens to form a sharp and distinct image

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Distortion

Astigmation

Chromatic aberration

Spherical aberration

Which of the following is heat transfer by means of the emission or absorption of electromagnetic radiation such as sunshine.

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Conduction or diffusion

Convection

Radiation

Mass transfer

When a current of 2 A flows for 5 s through a lamp 120 W of power are used How much charge flows through the lamp.

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10 C

12 C

24 C

60 C

Though the wavelength of X-rays is smaller than that of visible light yet the speed of X-rays in vacuum is.

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longer that that of visible light

Smaller than that of visible light

Same as that of visible light

Unpredictable

Which of the following measures how quickly the thermometer liquid mainly because it

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Is coloriess

Is a bad conductor of heat

Does not expand linearly

Has a low boiling point

The refractive index of benzenes is 1.5 What is the critical angle of benzene.

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0.667 ^o

42 ^o

48^o

90^o

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