Q:

If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

A) Concave	B) Convex
C) Cylindrical	D) Plane

Answer & Explanation Answer: A) Concave

Explanation:

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Q:

Find arc elasticity of demand, if quantity demanded falls from 1000 to 950 when price of the item is increased from Rs. 240 to Rs. 280?

A) 0.33	B) 0.3
C) -0.3	D) -0.33

Answer & Explanation Answer: D) -0.33

Explanation:

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Q:

One who eats everything

A) Carnivores	B) Omnivores
C) Herbivores	D) Omniscient

Answer & Explanation Answer: B) Omnivores

Explanation:

One the person or a animal who eats everything i.e, no kind of food is refused are called as Omnivores.

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4 1841

Q:

How many types of cancer are there in the world?

A) 56	B) 76
C) 96	D) 100

Answer & Explanation Answer: D) 100

Explanation:

There are more than 100 types of cancer in the world.

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1 1840

Q:

In total internal reflection, the light travel from

A) rarer to denser medium and it occurs with no loss of intensity	B) denser to rarer medium and it occurs with no loss of intensity
C) rarer to denser medium and it occurs with loss of intensity	D) denser to rarer medium and it occurs with loss of intensity

Answer & Explanation Answer: B) denser to rarer medium and it occurs with no loss of intensity

Explanation:

According to wave theories, for Total internal reflection tohappen: Light must travel from denser medium to rarer medium. Angle of incidence should be greater than critical angle. As in case of TIR, the image is perfectly clear, it implies that there has been no loss of intensity.

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1 1840

Q:

For which one of the following does the centre of mass lie outside the body?

A) A fountain pen	B) A cricket ball
C) A ring	D) A book

Answer & Explanation Answer: C) A ring

Explanation:

For balancing the weight of ring, you need to put your finger or any solid object inside the ring so that you will be able to sustain their own weight because they are not able to sustain their own weight.so its centre of mass lies outside the body.

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Q:

Supercooling is cooling of liquid _____.

A) below melting point	B) below freezing point
C) at melting point	D) above melting point

Answer & Explanation Answer: B) below freezing point

Explanation:

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Q:

Which of the following choices is a sound argument?

A) All teachers wear sarees. Mrs. Gomati does not wear a saree. Therefore, Mrs. Gomati is not a teacher.	B) All turtles are reptiles. The snake is not a turtle. Therefore, the snake is not a reptile.
C) Amitav Ghosh is an author. Arundati Roy is an author. Therefore, I want to be an author.	D) All of the above

Answer & Explanation Answer: A) All teachers wear sarees. Mrs. Gomati does not wear a saree. Therefore, Mrs. Gomati is not a teacher.

Explanation:

From the given choices, "All teachers wear sarees. Mrs. Gomati does not wear a saree. Therefore, Mrs. Gomati is not a teacher" is a sound argument.

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