Physics Questions

Q:

In a streamline flow, ________ at every point in the fluid remains same.

A) force B) pressure
C) pressure D) speed
 
Answer & Explanation Answer: C) pressure

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Q:

What is the unit of relative density?

A) kg/m B) kg/m2
C) kg/m3 D) It has no unit
 
Answer & Explanation Answer: D) It has no unit

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Q:

At boiling point of liquids , its

A) Temperature increases B) Atmospheric pressure increases
C) Temperature remains constant D) Vapour pressure decreases
 
Answer & Explanation Answer: C) Temperature remains constant

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Q:

A sound wave has a frequency of 4 kHz and a wavelength of 40 cm. The time taken by the sound wave to travel a distance of 3.2 km is

A) 0.5 s B) 2.0 s
C) 4.0 s D) 1.0 s
 
Answer & Explanation Answer: B) 2.0 s

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Q:

The SI unit of acceleration is _______________.

A) meters per seconds squared B) meters per second
C) seconds per meter D) seconds per meter squared
 
Answer & Explanation Answer: A) meters per seconds squared

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Q:

An earthquake of magnitude 6 on Richter scale has ______________ times more destructive energy than an earthquake of magnitude 4.

A) ten B) hundred
C) five D) thousand
 
Answer & Explanation Answer: D) thousand

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Q:

The coil wire in the electric room heater or electric cooking heater is called __________.

A) Circuit B) Element
C) Filament D) Cells
 
Answer & Explanation Answer: B) Element

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Q:

One nanometer is equal to _____________ meters.

A) 10 raised to the power (­3) B) 10 raised to the power (­-6)
C) 10 raised to the power (­-9) D) 10 raised to the power (­-12)
 
Answer & Explanation Answer: C) 10 raised to the power (­-9)

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