Questions

Q:

Which object converts electricity to light?

A) Solar panels B) Battery
C) Bulb D) All the above
 
Answer & Explanation Answer: C) Bulb

Explanation:

Bulb converts electricity to light whereas solar panel is the device which converts light to electricity.

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Q:

Which of the following devices converts Chemical energy into Electrical energy?

A) Electric heater B) Electric fan
C) Hair dryer D) Electric cell
 
Answer & Explanation Answer: D) Electric cell

Explanation:
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Q:

The mass per unit volume is called

A) Force B) Work
C) Density D) Pressure
 
Answer & Explanation Answer: C) Density

Explanation:
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Q:

What is the duration of the world’s shortest X–ray laser has been successfully created by the scientists?

 

A) 39 nanoseconds B) 43 attoseconds
C) 15 picoseconds D) 57 microseconds
 
Answer & Explanation Answer: B) 43 attoseconds

Explanation:
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Q:

Gol Gumbaz was built in which century?

A) 15th B) 16th
C) 17th D) 18th
 
Answer & Explanation Answer: C) 17th

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Q:

If tan (5x ­- 10°) = cot (5y + 20°), then the value of x + y is

A) 15° B) 16°
C) 22.5° D) 24°
 
Answer & Explanation Answer: B) 16°

Explanation:
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Q:

Who is the author of the book ­"My Experiments with Truth"?

A) Aristotle B) Winston Churchill
C) Jarnes Morris D) Mahatma Gandhi
 
Answer & Explanation Answer: D) Mahatma Gandhi

Explanation:
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Q:

Who discovered radioactivity?

A) Max Planck B) James Clerk Maxwell
C) Henri Becquerel D) Heinrich Hertz
 
Answer & Explanation Answer: C) Henri Becquerel

Explanation:
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