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4

The spectrum of white light can be studied by

A. a microscope

B. a telescope

C. a stereoscope

D. a spectroscope

Correct Answer :

D. a spectroscope


Related Questions

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Out of the following, name the fluorescent substance.

A. quinine sulphate solution

B. paraffin oil

C. fluorescein solutions

D. All the above

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Which part of the eye photographic camera?

A. Lens

B. Iris

C. Retina

D. Eyelid

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4

Warm air will hold more water vapour than cold air because

A. it is lighter

B. it has more water vapour in it

C. its molecules are close together

D. its molecules are far apart

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When temperature decreases, resistance of metals to flow of electricity

A. increases

B. decreases

C. neither increases nor decreases

D. first increases then decreases

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Which of the following is known as freon?

A. Liquid ammonia

B. Carbon tetrafluoride

C. Dichloro-difluoro-methane

D. Sulphur dioxide

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4

What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?

A. 18 km/sec

B. 11.2 km/ sec

C. 21 km/ sec

D. 35 km/ sec

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4

Red Light is used as a dancer signal because

A. it is pleasing to the eye

B. it has a traditional colour

C. it is easily distinguishable

D. it is most sensitive to the human eye

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4

The leader of the team who succeeded in constructing the first nuclear reactor (an atomic pile) in the world was

A. Albert Einstein

B. Enrico Fermi

C. HJ Bhabha

D. Sir Isaac Newton

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4

Which of the following can produce electricity?

A. resistor

B. thermocouple

C. light bulb

D. neon tube

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4

Choose the scalar quantity from the following physical quantities

A. force

B. velocity

C. acceleration

D. speed

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4

Cosmic rays contain

A. protons and electrons

B. alpha particles

C. gamma rays

D. All the above

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4

Water has maximum density at

A. 0° C

B. -15° C

C. 4° C

D. 15° C

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4

The period of oscillation of a simple pendulum depends upon

A. the mass of its bob

B. the material of the bob

C. the amplitude of vibration

D. acceleration due to the gravity at the site of experiment

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4

Which mirror is used as a rear view mirror in Vehicles?

A. Parabolic

B. Convex

C. Concave

D. Plain

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Under similar conditions of temperature and pressure, the velocity of sound is maximum in

A. helium

B. argon

C. hydrogen

D. oxygen

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When ice melts, Its volume

A. decreases

B. increases

C. remains the same until all the ice has melted and then increases

D. remains the same

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A lactometer is used to

A. find out the specific gravity of liquids

B. measure the volumes of liquids

C. test the purity of milk

D. determine the strength of acid in car batteries

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4

You want a supply of a small but constant current. Which of the following cells will you prefer?

A. Daniell cell

B. Leclanche cell

C. Dry cell

D. All the above

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4

Which metal is used in storage batteries?

A. Copper

B. Lead

C. Tin

D. Iron

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4

The asteroids belt lies between the orbits of

A. Earth and Mars

B. Venus and Earth

C. Mars and Jupiter

D. Moon and Mars

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At what temperature do the Fahrenheit and Kelvin scales give the same reading?

A. 212°

B. 32°

C. -40°

D.

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The planet with the reddish tinge is

A. Jupiter

B. Mars

C. Mercury

D. Saturn

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The scientist who first sent electromagnetic waves to distant places was

A. James Clerk Maxwell

B. Heinrich Hertz

C. Thomas Alva Edison

D. Baird

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4

The principle on which a Jet engine works is

A. conservation of mass

B. Newtonian law of action and reaction

C. conservation of angular momentum

D. None of the above

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Lightning conductors are made of

A. iron

B. chromium

C. copper

D. steel

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The property of a fluid by which it resists relative motion within itself is known as

A. cohesive force

B. surface tension

C. diffusion

D. viscosity

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The distance between two bodies is halved. Now the force of attraction between them will be

A. half

B. one fourth

C. four times

D. two times

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An electric charge is measured in

A. coulomb

B. ampere

C. volt

D. watt

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4

The atmosphere gets heated up mainly by

A. direct sun's rays

B. radiation from earth's surface

C. radiogenic heat (resulting from radioactive decay)

D. cosmic rays coming from space

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4

At what temperature do the Fahrenheit and Celsius scales give the same reading?

A. 212°

B. 32°

C. -40°

D.