Physics Questions

Q:

 During the night, the direction of the wind would be from the __________________.

A) valleys to the mountains   B) mountains to the valleys
C) land to the sea D) sea to the land
 
Answer & Explanation Answer: C) land to the sea

Explanation:
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Q:

What does the slope of a velocity time graph represent?

A) Acceleration B) Distance
C) Speed D) Momentum
 
Answer & Explanation Answer: A) Acceleration

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Q:

Air expands when it _______________.

A) is cooled B) is heated
C) is under pressure D) becomes more humid
 
Answer & Explanation Answer: B) is heated

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Q:

In a hydrogen atom, an electron moves in an orbit of radius 5.0 x 10-11 m with a speed of 2.2 x 106 m/s. What is the equivalent current? (Electronic charge = 1.6 x10-19 C)

 

 

A) 0.112 mA B) 112 mA
C) 11.2 mA D) 1.12 mA
 
Answer & Explanation Answer: D) 1.12 mA

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Q:

What is the SI unit of Force?

A) Pascal B) Boyle
C) Newton D) Watt
 
Answer & Explanation Answer: C) Newton

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Q:

Which of the following is an example of thermoplastics?

A) Bakelite B) Melamine
C) PVC D) No option is correct
 
Answer & Explanation Answer: C) PVC

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Q:

Light travels fastest in

A) Nitrogen B) Air
C) Steel D) Vacuum
 
Answer & Explanation Answer: D) Vacuum

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Q:

Which  one  of  the following  is  the  value  of one nanometer?

A) 10-7 cm B) 10-6 cm
C) 10-4  cm D) 10-3  cm
 
Answer & Explanation Answer: A) 10-7 cm

Explanation:

1 nanometer (nm) of length

Equals: 0.00000010 centimetres (cm) in length.

This is equal to 10^-7 cm.

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