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Q:

What is unit of Viscosity ?

A) coulomb B) newton second per square meter
C) watt per meter per degree celcius D) joule per kilogram per Kelvin
 
Answer & Explanation Answer: B) newton second per square meter

Explanation:

coulomb is unit of Electric Charge,

watt per meter per degree celcius is unit of Thermal Conductivity,

joule per kilogram per Kelvin is unit of Specific Heat capacity.

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Q:

Radian is used to measure

A) Temperature B) Intensity of Flame
C) Angle D) Solid Angle
 
Answer & Explanation Answer: C) Angle

Explanation:

Kelvin is used to measure Temperature,

Candela is used to measure Intensity of flame,

Steredian is used to measure Solid Angle.

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Q:

Nuclear sizes are expressed in a unit named

A) Fermi B) Angstrom
C) Newton D) Tesla
 
Answer & Explanation Answer: A) Fermi

Explanation:

Nuclear sizes are expressed in a unit called "Fermi" which is a unit of length equal to 10−15 metre (one femtometre), used in nuclear physics. It is similar to the diameter of a proton.

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Q:

Radiocarbon is produced in the atmosphere as a result of

A) collision between fast neutrons and nitrogen nuclei present in the atmosphere B) action of ultraviolet light from the sun on atmospheric oxygen
C) action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere D) lightning discharge in atmosphere
 
Answer & Explanation Answer: A) collision between fast neutrons and nitrogen nuclei present in the atmosphere

Explanation:
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Q:

The basic reason for the extraordinary sparkle of suitably cut diamond is that

A) it has well defined cleavage planes B) it has a very high transparency
C) it has a very high refractive index D) it is very hard
 
Answer & Explanation Answer: C) it has a very high refractive index

Explanation:
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Q:

An air bubble in water will act like a

A) convex lens B) convex mirror
C) concave lens D) concave mirror
 
Answer & Explanation Answer: C) concave lens

Explanation:

An_air_bubble_in_water_will_act_like_a1557488532.jpg image

The lens which have atleast one inward curved surface is a concave lens. Concave ens is a diverging lens as it spreads out light rays that have been refracted through it.

A concave lens is thinner at its centre than at its edges.

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Q:

The speed of light will be minimum while passing through

A) water B) vaccum
C) air D) glass
 
Answer & Explanation Answer: D) glass

Explanation:
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Q:

In case of uniform circular motion, the acceleration is

A) Variable in magnitude but constant in direction B) Constant in magnitude and directed radially inwards
C) Variable in magnitude but tangential to the circle D) Zero
 
Answer & Explanation Answer: A) Variable in magnitude but constant in direction

Explanation:
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