Questions

Q:

Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? 

A) K1k2/k1+k2 B) 2k1k2/k1+k2
C) K1+k2/k1k2 D) None
 
Answer & Explanation Answer: B) 2k1k2/k1+k2

Explanation:

We know that,

 

The equivalent K =  L1 + L2L1K1+L2K2

 

where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.

 

But here L1 = L2 = L (say)

 

Then K = L+L/(L/K1 + L/K2)  =  2K1K2K1+K2

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Filed Under: Physics
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Q:

Decibel is the unit of

A) speed of light B) intensity of sound
C) intensity of heat D) None of these
 
Answer & Explanation Answer: B) intensity of sound

Explanation:
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Q:

Which of the statements given below are correct?

1. The author of the novel 'Forty Thieves' is Thomas Perry.
2. The author of the novel 'Half of a Yellow Sun' is Jennifer Egan.
3. The author of the novel 'Middlesex' is Chimamanda Ngozi Adichie.

A) 1 and 2 B) 2 and 3
C) 1 and 3 D) 1, 2 and 3
 
Answer & Explanation Answer: B) 2 and 3

Explanation:
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Filed Under: Books and Authors
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Q:

The lead character in the film ' The Bandit Queen  ' has been played by

A) Shabana Azmi B) Rupa Gangulu
C) Seema Biswas D) Arundhati ray
 
Answer & Explanation Answer: C) Seema Biswas

Explanation:
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10 7175
Q:

In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Answer

  Zero. You are selecting names from the list, so they are all listed.

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Subject: Math Puzzles

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Q:

An object at rest may have

A) Momentum B) Potential energy
C) Velocity D) Kinetic energy
 
Answer & Explanation Answer: B) Potential energy

Explanation:

An object at rest may have Potential energy.

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14 7175
Q:

In plants, exchange of gases takes place through

A) Stomata B) Palisade tissue
C) Spongy tissue D) mid rib
 
Answer & Explanation Answer: A) Stomata

Explanation:
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Filed Under: Biology

48 7175
Q:

Nepal Government announces public holidays during Nepalese President's visit to _____

A) India B) China
C) Japan D) Russia
 
Answer & Explanation Answer: A) India

Explanation:

Nepalese President Bidya Devi Bhandari is arriving in New Delhi on a five-day visit to India. This will be Bhandari's first foreign trip after assuming the office in October 2015, following the promulgation of the new Constitution in Nepal.

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Filed Under: General Awareness
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