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1 Physics MCQs

The rear view mirror of a motor vehicle is ________?

  • Concave
  • Plane
  • Convex
  • Biconcave
0 Comments
Correct Answer: C. Convex

Explanation:

The rear-view mirror of a motor vehicle is convex because a ... Read More Details

2 Physics MCQs

Lead ball falls through water more slowly than through air because __________?

  • The value of ‘g’ is less in water
  • Density of air is less than that of water
  • Of the viscous force in water
  • Of the surface tension of water
0 Comments
Correct Answer: C. Of the viscous force in water

Explanation:

A lead ball falls through water more slowly than through air ... Read More Details

3 Physics MCQs

Which one of the following sets of color combinations is added in color vision in TV’?

  • Red, green and blue
  • Orange, black and violet
  • White, red and yellow
  • Yellow, green and blue
0 Comments
Correct Answer: A. Red, green and blue

Explanation:

Color televisions create images using the additive color mixing principle, where ... Read More Details

4 Physics MCQs

Water is a highly effective coolant for a car engine because _________?

  • Water is good conductor of heat
  • Water has very high specific heat capacity
  • Water boils at a comparatively high temperature
  • Evaporation of water produces lot of cooling
0 Comments
Correct Answer: B. Water has very high specific heat capacity

Explanation:

Water is widely used as a coolant in car engines because ... Read More Details

5 Physics MCQs

Scalding with steam is more severe than scalding by boiling water because_______?

  • Steam can penetrate the skin
  • Steam is at a higher temperature
  • Steam contains more energy than boiling water
  • Steam is at a higher pressure
0 Comments
Correct Answer: C. Steam contains more energy than boiling water

Explanation:

Scalding with steam is more severe than scalding by boiling water ... Read More Details

6 Physics MCQs

The cracking sound heard when dry hair is combed with a hard rubber comb is due to

  • The hair barging against the charged comb
  • Small electric sparks
  • The rubbing of the comb with the hair
  • None of the above
0 Comments
Correct Answer: B. Small electric sparks

Explanation:

The cracking or snapping sound heard when dry hair is combed with a ... Read More Details

7 Chemistry MCQs

The coating of iron pipes with zinc to prevent corrosion is called?

  • Electroplating
  • Annealing
  • Galvanization
  • Vulcanization
0 Comments
Correct Answer: C. Galvanization

Explanation:

The process of coating iron or steel with a layer of zinc to ... Read More Details

8 Chemistry MCQs

Detergents dissolved in water help in cleaning clothes by?

  • Increasing the temperature of water
  • Reacting chemically with dirt
  • Reducing the surface tension of water
  • Dissolving dirt
0 Comments
Correct Answer: C. Reducing the surface tension of water

Explanation:

Detergents clean clothes effectively because they reduce the surface tension of water, allowing ... Read More Details

9 Physics MCQs

The absorption of ink by blotting paper involves__________?

  • Viscosity of ink
  • Capillary action phenomenon
  • Diffusion of ink through the blotting
  • Siphon action
0 Comments
Correct Answer: B. Capillary action phenomenon

Explanation:

The absorption of ink by blotting paper is an example of ... Read More Details

10 Physics MCQs

Materials for rain-proof coats and tents owe their water proof properties to________?

  • Surface tension
  • Viscosity
  • Specific gravity
  • Elasticity
0 Comments
Correct Answer: A. Surface tension

Explanation:

The waterproof properties of materials used in rain-proof coats and tents ... Read More Details

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