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 Physics Questions

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Q:

Fill in the blank with the most appropriate option.

 

The Universal Constant of Gravitation is ___.

 

A) 6.67 x 1010 Nm2/kg2 B) 6.67 x 10-10 Nm2/kg2
C) 6.67 x 10-11 Nm2/kg2 D) 9.8 Nm2/kg2
 
Answer & Explanation Answer: C) 6.67 x 10-11 Nm2/kg2

Explanation:
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Q:

Which of the following statements is true?

The velocity of sound is :

 

A) less in summer than in winter B) same in winter and summer
C) independent of seasons D) more in summer than in winter
 
Answer & Explanation Answer: D) more in summer than in winter

Explanation:
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Q:

Velocitation is the tendency to

A) be traveling at a speed that is faster than perceived B) be traveling at a speed that is slower than perceived
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) be traveling at a speed that is faster than perceived

Explanation:

Velocitation is a phenomenon caused by driving for long periods at high speeds. A driver may experience velocitation when coming off of the highway; the change in speed makes him or her think that the car is going much slower than it actually is.

 

Velocitation is the tendency to be traveling at a speed that is faster than perceived.

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4 8272
Q:

The capacity of a pure capacitor is 1 farad. In D.C circuit, its effective resistance will be

A) Zero B) Infinite
C) 1 Ohm D) 1/2 Ohm
 
Answer & Explanation Answer: B) Infinite

Explanation:
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29 8263
Q:

Match the following with the correct response.

 

(1) W (A) Nm
(2) kW       (B) 3.6 x 106 J
(3) 1 kW-h (C) 1000 W
(4) 1 HP (D) 746 W

A) 1-D, 2-B, 3-C, 4-A B) 1-A, 2-B, 3-C, 4-D
C) 1-A, 2-C, 3-D, 4-B D) 1-A, 2-C, 3-B, 4-D
 
Answer & Explanation Answer: D) 1-A, 2-C, 3-B, 4-D

Explanation:
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1 8177
Q:

At the Curie temperature, the ferromagnetic materials get converted into

A) Diamagnetic materials B) Non-magnetic materials
C) Paramagnetic materials D) None of the others
 
Answer & Explanation Answer: C) Paramagnetic materials

Explanation:
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Q:

In very cold countries alcohol is used as a thermometric liquid because 

A) alcohol is a poor conductor of heat B) alcohol can be coloured for its level to be seen easily
C) its freezing point is very low D) it will not stick to the glass tube
 
Answer & Explanation Answer: C) its freezing point is very low

Explanation:

Alcohol has a freezing point as low as -117oC. So it won't freeze even in very cold countries.

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Q:

Where should a boat compass be mounted?

A) near magnet B) near iron
C) away from electrical wiring D) All the above
 
Answer & Explanation Answer: C) away from electrical wiring

Explanation:

A compass, which is used to assist in navigation, is an instrument that shows magnetic north. You must apply a correction to determine the direction of true north. The ability to steer a boat by a compass is useful if land is out of sight, visibility is reduced, or the boat operator is disoriented.

 

Mount a boat compass away from iron, magnets, and electrical wiring and equipment.

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