Physics Mock Test series - 6

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The electrolyte used in a dry cell is -

Acid of sulpher

Zinc

Manganese dioxide

Ammonium chloride

Potential is measured in-

Watt

Newton-second

Joule

Joule/Coulomb

Which of the following works on the basis of conservation of linear momentum?

Rocket

Aeroplane

Jet

Helicopter

Which of the following is most elastic?

Rubber

Plastic

Wet clay

Steel

The velocity of sound produced by a vibrating body varies-

inversely as the frequency of the medium

inversely as the density of the medium

directly as the sq. root of frequency of the medium

directly as the sq. root of density of the medium

The displacement-time graph of a particle acted upon by a constant force is-

A circle

A straight line

Any curve

A parabola

Newtons's first law is also called as-

Law of inertia

Law of momentum

Law of energy

Law of moments

Matter waves are-

de Broglie wave

Electromagnetic waves

Transverse waves

Longitudinal waves

The magnifying power of a telescope can be increased by-

increasing the diameter of the eyepiece

increasing the diameter of the objective

reducing the focal length of the eye piece

reducing the focal length of the objective

10.

When a plane glass slab is placed over colored letters, the letter that appears least raised is—

Green

Violet

Red

Blue

11.

X-rays can be used-

to detect gold under the earth

for cutting and welding of metals

to detect heart diseases

to detect in precious stones and diamonds

12.

Fleming's right hand rule is used to find the direction of the-

Alternate current

Actual current

Direct current

Induced current

13.

The phenomenon of forming a three-dimensional image by the interference of two light beams from a laser or other coherent light sources is called—

Radiography

X-ray photography

Holography

Optical photography

14.

15.

Which of the following is not caused by atmospheric refraction of light?

Twinkling of stars at night

Sun appearing red at sunset

Sun appearing higher in the sky than it actually is

Sun becoming visible two or three minutes before actual sunrise

16.

An atomic pile is used for-

conducting nuclear fission

temperature

producing X-rays

conducting thermonuclear fission

17.

The mass number of an atom is determined by -

adding the number of neutrons and number of elections

adding the number of protons and number of elections

adding the number of neutrons and number of protons

the number of protons only

18.

The speed of light with the rise in the temperature of the medium-

Decreases

Remains unaltered

Drops suddenly

Increases

19.

If the radius of the earth were shrink by one percent, its mass remaining the same, the value of 'g' on the earth's surface would-

Increase by 0.5%

Decrease by 2%

Increase by 2%

Decrease by 0.5%

20.

When X-rays are produced, then-

temperature of the target is being constant.

a luminous light is to be seen on the target

heat is produced on the target

heat is observed by the target

21.

A permanent magnet repels—

Paramagnetic substances only

Diamagnetic substances only

both paramagnetic and diamagnetic substances

ferromagnetic substances only

22.

Rainbows are produced when sunlight-

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.

Incident on rains drops hanging in the atmosphere is dispersed after suffering refraction.

None of the given statements is correct.

Incident on raindrops hanging in the atmosphere is dispersed after sufferings reflection.

23.

A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens?

-3.0 D

+0.8 D

+3.0 D

-0.8 D

24.

Which of the following lenses/mirror used by dentist to see the image of teeth of a patient?

Convex mirror

Concave mirror

Plane mirror

Concave lenses

25.

At normal temperature, due to a puncture, the compressed air inside the tube of a car wheel suddenly starts coming out. Then the air inside the tube-

may become hotter or cooler depending on the amount of water vapour present in the air.

remains at the same temperature

Starts becoming hotter

Starts becoming cooler

Physics Mock Test series - 6

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