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Q:

If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

A) lUV < lIR < lVIS B) lUV > lVIS > lIR
C) lUV > lIR > lVIS D) lUV < lVIS < lIR
 
Answer & Explanation Answer: D) lUV < lVIS < lIR

Explanation:

Infrared radiation, what we experience as heat when we hold our hand near a warm object, is somewhat longer wavelengths than visible light. Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to. Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light. Ultraviolet is shorter wavelengths than violet.

Longer the wavelength,lower the energy

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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.

Incapacitate

A) Cripple B) Facilitate
C) Maim D) Immobilize
 
Answer & Explanation Answer: B) Facilitate

Explanation:
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Q:

Select the word with the correct spelling.

A) quaffing B) conveynor
C) fuselag D) bumbbling
 
Answer & Explanation Answer: A) quaffing

Explanation:
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Q:

The washing machine works on the principle of ____________

A) Dialysis B) Diffusion
C) Reverse osmosis D) Centrifugation
 
Answer & Explanation Answer: D) Centrifugation

Explanation:
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Q:

Major portion of the earth's crust is mainly constituted by

A) Oxygen and Iron B) Oxygen and Silicon
C) Silicon and Iron D) Silicon and Aluminium
 
Answer & Explanation Answer: B) Oxygen and Silicon

Explanation:
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Filed Under: General Science
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Q:

Which of the following uses a nonrenewable energy source to make electricity?

A) power plant B) wind mill
C) swimming pool D) All of the above
 
Answer & Explanation Answer: A) power plant

Explanation:

From the given options, a power plant uses a nonrenewable energy source to make electricity. A power plant uses coal for making power production.

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Q:

In the following question, a word has been written in four different ways out of which only one is correctly spelt. Select the correctly spelt word.

A) Meidieval B) Medieval
C) Medeival D) Medievul
 
Answer & Explanation Answer: B) Medieval

Explanation:
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Filed Under: English
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Q:

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Pithy

 

A) Verbose B) Brief
C) Lengthy D) Unabridged
 
Answer & Explanation Answer: B) Brief

Explanation:
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