General Science - Physics MCQs

166.

Which among the following is true about conduction, convection and radiation mode of transfer of heat?

   A.) A Medium is required for conduction but not required for convection and radiation
   B.) A medium is required for conduction, convection and radiation
   C.) A medium is required for conduction and convection but not required for radiation
   D.) A medium is not required for conduction and convectio, radiation

Answer: Option 'C'

A medium is required for conduction and convection but not required for radiation

167.

Which of the following term denotes the internal reaction force per unit area developed as a result of applied external force ?

   A.) Stress
   B.) Friction
   C.) Moment of Inertia
   D.) tension

Answer: Option 'A'

Stress

168.

Which among the following kinds of glass is used generally in making of the Bullet proof screens?

   A.) Flint Glass
   B.) Reinforced Glass
   C.) Pyrex glass
   D.) Jena glass

Answer: Option 'B'

Reinforced Glass
Reinforced Glass or Toughened glass or tempered glass is a kind of safety glass is used as s a component of bulletproof glass, for diving masks, and various types of plates and cookware.

169.

Who among the following is the chairman of Council of Scientific and Industrial Research (CSIR)?

   A.) Prime Minister of India
   B.) Secretary, Department of Technology
   C.) Minister of Science & Technology
   D.) None of them

Answer: Option 'A'

Prime Minister of India

170.

On a smooth glass surface , the drop of water spreads while the drop of mercury remains almost spherical. This proves that ________?

   A.) Cohesive forces of mercury is more than adhesive forces with glass
   B.) Cohesive force of water is less than cohesive forces of mercury
   C.) mercury is a metal
   D.) 1 & 2

Answer: Option 'A'

Cohesive forces of mercury is more than adhesive forces with glass

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