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Q:

If an empty cylinder is half filled with a liquid, its center of gravity is

A) shifted upwards	B) shifted downwards
C) shifed neither upward nor downward	D) shifted upward or downward depending on the density of the liquid

Answer & Explanation Answer: B) shifted downwards

Explanation:

Effect of adding liquid is to make the cylinder more bottom heavy which is a more stable position

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Filed Under: Physics

Q:

If a body weighs 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?

A) 12N	B) 2N
C) 10N	D) 6N

Answer & Explanation Answer: B) 2N

Explanation:

Weight is mass x g. Since mass is constant and g is only ${\frac{1}{6}}^{t h}$ of that on the earth. The weight on the moon is only ${\frac{1}{6}}^{t h}$ of that on the earth.

Therefore 2N i.e (b) is the answer.

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Filed Under: Physics
Exam Prep: AIEEE

Q:

A boy is swinging a ball attached to a string in a horizontal circle.If the string snaps

A) the ball will travel towards the center of the circle and fall down	B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C) it will fall down at the same place where the string breaks	D) none of these

Answer & Explanation Answer: B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Explanation:

The centripetal force having been removed the body cannot execute the curved path. (B) is Correct.

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Filed Under: Physics

Q:

In the case of bodies falling under gravity which of the following remains constant at a given place?

A) Kinetic energy	B) Potential energy
C) acceleration	D) all the above

Answer & Explanation Answer: C) acceleration

Explanation:

This acceleeration denoted by letter g varies from place to place. Unless stated otherwise, it can be taken 9.8 m/ $s^{2}$ .

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Filed Under: Physics
Exam Prep: AIEEE

Q:

A cyclist leans inwards when he is negotiating a curve so that

A) he may increase his speed	B) his weight may be reduced
C) necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.	D) no frictional force may be produced between the wheels and the axle

Answer & Explanation Answer: C) necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.

Explanation:

No circular or curved motion is possible without providing the necessary centripetal force. (C) provides this and so is the answer.

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Filed Under: Physics

Q:

The Kinetic energy of gas molecules

A) is unaffected by temperature variations	B) decreases with increase of temperature
C) increases with decrease of temperature	D) increases with increase of temperature

Answer & Explanation Answer: D) increases with increase of temperature

Explanation:

Kinetic Energy $K . E = \frac{1}{2} m V^{2}$ or

$K . E \propto V^{2}$ , Where 'm' is the mass and 'v' is the velocity of molecules.

Velocity is proportional to temperature. Hence, KE is proportional to temperature and would increase with temperature.

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Filed Under: Chemistry
Exam Prep: AIEEE

Q:

Choose the option which indicates a valid argument containing logically related statements that is, where the third statement is a conclusion drawn from the preceding two statements.

A. Some straight forward things are people

B. All Perennial things are cats

C. Only cats are Perennial

D. All Perennial things are People

E. Some Straight forward things are cats

F. Some Straight forward things are Perennial

A) BCA	B) CFD
C) DFA	D) EAB

Answer & Explanation Answer: C) DFA

Explanation:

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Filed Under: Logic

Q:

Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

I. All IIMs are in India. No BIMs are in India. No IIMs are BIMs

II. All IIMs are in India. No BIMs are in India .No BIMs are IIMs

III. Some IIMs are not in India. Some BIMs are not in India. Some IIMs are BIMs.

IV. Some IIMs are not in India. Some BIMs are not in India. Some BIMs are IIMs.

A) I Only	B) II Only
C) I and II	D) III and IV

Answer & Explanation Answer: C) I and II

Explanation:

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Filed Under: Logic

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