PHYSICS - 03 (LEE EDUTEK PRIVATE LIMITED PH NO 9704875189)

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QUIZ FOR PHYSICS

One should not connect a number of electrical appliances to the same power socket because

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this can damage the appliances due to overloading

this can damage the domestic wiring due to overloading

this can damage the electrical meter

the appliance will not get full voltage

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Solar eclipse will take place when

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the sun is between the moon and the earth

the earth is between the moon and the sun

the moon is between the sun and the earth

the moon does not lie on the line joining the sun and the earth

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Isotopes of an element contain

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the same number of protons but different number of neutrons

the same number of neutrons but different number of protons

equal number of protons and electrons

equal number of nucleons

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It is easier to roll a barrel full of coal tar than to pull it because

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the full weight of the barrel comes into play when it is pulled

the rolling friction is much less than the sliding friction

more surface area of the barrel is in contact with the road when it is pulled

coal tar is a liquid and it flows in the barrel when it is rolled

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On a stationary sail boat, air is blown from a fan attached to the boat. The boat

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moves in opposite direction in which the air is blown

does not move

moves in the same direction in which air blows

spins around

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Natural radioactivity was discovered by

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Marie Curie

Ernest Rutherfor

Henri Becquerel

Enrico Fermi

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Stars which appear single to the naked eye but are double when seen through a telescope are

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novas and supernovas

binaries

asteroids

quasars

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Supersonic plane fly with the speed

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less than the speed of sound

of sound

greater than the speed of sound

of light

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In which of the following industries is mica as a raw material?

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Cement

Glass and Pottery

Iron and Steel

Electrical

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Optical fibre works on the

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principle of refraction

total internal reflection

scattering

interference

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Mica is used in electrical appliances such as electric iron because mica is

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a good conductor of heat but a bad conductor of electricity

a bad conductor of heat but a good conductor of electricity

a good conductor of heat as well as electricity

a bad conductor of heat as well as electricity

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Radiocarbon dating technique is used to estimate the age of

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rocks

monuments

soil

fossils

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Identify the vector quantity from the following

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Heat

Angular momentum

Time

Work

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Planets are

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luminous heavenly bodies revolving around a star

non-luminous heavenly bodies

luminous heavenly bodies that twinkle

luminous heavenly bodies that do not twinkle

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Out of the following pairs, which one does not have identical dimension?

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Moment of inertia and moment of a force

Work and Torque

Angular momentum and Planck's constant

Impulse and Momentum

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Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in

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4.2 seconds

42 seconds

4.2 years

42 years

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One watt-hour is equivalent to

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Option 1

Option 2

Option 3

Option 4

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Mach number is used in connection with the speed of

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sound

aircraft

spacecraft

ships

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moment of inertia

pressure

elasticity

couple acting on a body

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Large astronomical telescopes always use as objective

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lens

mirror

combinations of lenses

None of the above

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Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?

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Scattering

Diffraction

Interference

Polarization

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One nanometer is equal to

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Option 1

Option 2

Option 3

Option 4

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Mercury is commonly used as a thermometric fluid rather than water because

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specific heat of mercury is less than water

specific heat of mercury is more than water

mercury has greater visibility than water

density of mercury is more than the water

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Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? I.Diffusion II.Refraction III.Internal reflection

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I, II and III

I and II

II and III

I and III

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Rainbow is due to

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absorption of sunlight in minute water droplets

diffusion of sunlight through water droplets

ionisation of water deposits

refraction and reflection of sunlight by water droplets

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