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 = $\frac{L 1 + L 2}{\frac{L 1}{K 1} + \frac{L 2}{K 2}}$

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) = $\frac{2 K 1 K 2}{K 1 + K 2}$

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12 7184

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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Filed Under: Physics

15 7179

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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Filed Under: Books and Authors

10 7175

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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Filed Under: Physics
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Job Role: Analyst , Bank Clerk , Bank PO

14 7172

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 7170

Q:

What are the reasons for process suspension?

Answer

swapping

interactive user request

timing

parent process request

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Subject: Operating Systems

19 7165

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

6 7158

Q:

Germany signed the Armistice Treaty on ____ and World War I ended

A) January 19, 1918	B) May 30, 1918
C) November 11, 1918	D) February 15, 1918

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