Questions

Q:

Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

 

A) 2R B) R/2
C) 5R/4 D) 3R/4
 
Answer & Explanation Answer: C) 5R/4

Explanation:

So, resistance of Wire 2 is R/4 as radius is half of wire 1, so area would be 4 times of wire 1.

Now for resistance in series. R= R1 + R2.

Therefore, Final R= R + R/4 = 5R/4

 

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

Which cartoon characters were created by William Hanna and Joseph Barbara in 1940?

A) Oswald & Noddy B) Tom & Jerry
C) Mickey mouse & Sylvester D) Donald duck & Tweety
 
Answer & Explanation Answer: B) Tom & Jerry

Explanation:

Tom Cat and Jerry Mouse were the two cartoon characters created by William Hanna and Joseph Barbara in 1940.

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Filed Under: Famous Personalities
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Q:

Where is the headquaters of world health organisation

A) Geneve, Switzerland B) New Delhi, India
C) London,UK D) None of these
 
Answer & Explanation Answer: A) Geneve, Switzerland

Explanation:
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Filed Under: World Organisations

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Q:

In economics, if a good is inelastic,

A) its supply or demand is not sensitive to price changes. B) consumers have lost an interest in purchasing it.
C) producers have lost an interest in manufacturing it. D) its supply or demand is too sensitive to price changes.
 
Answer & Explanation Answer: A) its supply or demand is not sensitive to price changes.

Explanation:

If the percent change in quantity demanded is less than the percent change in price, economists label the demand for the good as inelastic.

A good that is inelastic does not have very stretchy demand. In economic terms, the quantity demanded does not change a lot when the price changes.

 

So, if the price of a good increases by 10 percent and the quantity demanded decreases by only 5 percent or less than 10, that good is said to have inelastic demand.

 

Hence, in this case, consumers are not considered very sensitive, or responsive, to a change in the price of that good.

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Filed Under: Indian Economy
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Q:

Which gas is used for the preparation of Soda water?

A) Carbon Dioxide B) Oxygen
C) Hydrogen D) Ammonia
 
Answer & Explanation Answer: A) Carbon Dioxide

Explanation:
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Filed Under: Chemistry
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Q:

Which of these is ATP?

A) 3 Phosphate groups attached to chromosome attached to Adenine B) 3 Phosphate groups attached to a Ribose attached to Adenine
C) 3 Phosphate groups attached to a Ribose attached to Thymine D) None of the above
 
Answer & Explanation Answer: B) 3 Phosphate groups attached to a Ribose attached to Adenine

Explanation:

ATP is a Adenosine Triphosphate.

 

ATP is 3 Phosphate groups attached to a Ribose attached to Adenine.

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Filed Under: Chemistry
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Q:

Which metal is the best conductor of heat?

A) Silver B) Gold
C) Copper D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Silver is the best conductor of both heat and electricity among metals with a thermal conduction value of about 430 W/(mK).

Gold and copper both come respectably close to silver.

 

Copper being significantly less costly it is often chosen over silver in many applications.

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Filed Under: Physics
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Q:

Chemically marble is known as

A) Calcareous rock B) Siliceous Rock
C) Argillaceous Rock D) Metamorphic Rock
 
Answer & Explanation Answer: A) Calcareous rock

Explanation:

Chemically marble is known as Calcareous rock as it is composed of carbonate minerals like calcite or dolomite.

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Filed Under: General Science
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