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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:

Which of the following electromagnetic waves has minimum wavelength?

 

A) Alpha B) Gamma
C) Infrared D) X-rays
 
Answer & Explanation Answer: B) Gamma

Explanation:
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Q:

Echoes may be heard more than once due to successive or multiple

 

A) Rarefactions B) Reflections
C) Diffractions D) Refractions
 
Answer & Explanation Answer: B) Reflections

Explanation:
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Q:

Find the work done (in J) when a charge of 20 C moves across a potential difference of 4 V.

 

 

A) 5 B) 40
C) 80 D) 10
 
Answer & Explanation Answer: C) 80

Explanation:
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Q:

Calculate the pressure (in Pa) if a thrust of 750 N is applied to an area of 5 m2.

 

A) 37.5   B) 150  
C) 75   D) 100
 
Answer & Explanation Answer: B) 150  

Explanation:
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Q:

Calculate the power (in W) of an engine if it can perform 120 J of work in 3 seconds.

 

A) 360 B) 80
C) 180 D) 40
 
Answer & Explanation Answer: D) 40

Explanation:
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Q:

The unit of momentum is

 

A) Kgms2 B) Kgms-1
C) Kgms D) Kgms-2
 
Answer & Explanation Answer: B) Kgms-1

Explanation:
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Q:

Seismic waves are recorded by an instrument called the ________________.

 

A) seismograph B) odograph
C) isograph D) lithograph
 
Answer & Explanation Answer: A) seismograph

Explanation:
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