Physics Questions

Q:

Which of the following has highest penetration power?

 

A) α– radiations   B) β– radiations  
C) γ– radiations   D) All have same penetration power.  
 
Answer & Explanation Answer: C) γ– radiations  

Explanation:
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Q:

According to Rutherford the radius of the nucleus is about ______ than the radius of the atom.

 

A)  105 times greater B) 105 times lesser
C) 109 times greater D) 107 times greater
 
Answer & Explanation Answer: B) 105 times lesser

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Q:

Which of the following is not a vector quantity?

A) speed B) velocity
C) torque D) displacement
 
Answer & Explanation Answer: A) speed

Explanation:

Which_of_the_following_is_not_a_vector_quantity1552385336.png image

A vector quantity is a quantity which has both magnitude and direction. Here in the given options, speed is a scalar quantity but not the vector quantity.

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Q:

How many millimeters make ten kilometers?

 

A) 1010 B) 109
C) 108 D) 107
 
Answer & Explanation Answer: D) 107

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Q:

The gravitational force of attraction between two bodies is __________________ the product of their masses.

 

A) directly proportional to the square of B) inversely proportional to
C) inversely proportional to the square of   D) directly proportional to  
 
Answer & Explanation Answer: D) directly proportional to  

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Q:

In Force equation, F is equal to

 

A) ma B) mv
C) u+at D) mgh
 
Answer & Explanation Answer: A) ma

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Q:

The power of _____________ is expressed in terms of a magnitude on a scale called Richter scale.

 

A) a tornado   B) a volcano  
C) an earthquake   D) a thunderstorm
 
Answer & Explanation Answer: C) an earthquake  

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Q:

Light is a ______________ wave.

 

A) longitudinal B) elastic
C) transverse D) mechanical
 
Answer & Explanation Answer: C) transverse

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