Physics : General Knowledge Questions and Answers

Q41. What is the SI unit of pressure?

[A] Jule

[B] Pascal

[C] Dyne

[D] Newton

Q42. Radon is formed in the alpha decay of

[A] actinium

[B] thorium

[C] radium

[D] uranium

Q43. The modulus of elasticity for mild steel is approximately equal to

[A] 100 kN/mm2

[B] 210 kN/mm2

[C] 10 kN/mm2

[D] 80 kN/mm2

Q44. No current will flow between two charged bodies if they have the same 

[A] charge

[B] potential

[C] charge/ potential ratio

[D] resistance

350+ Physics Quiz Questions and Answers

Q45. Which of the following are Mechanical waves?

[A] Microwaves

[B] X rays

[C] Sound waves

[D] Radio waves

Q46. Photosynthesis takes place faster in

[A] white light

[B] darkness

[C] yellow light

[D] red light

Q47. Total internal reflection can take place when light travels from

[A] Air to glass

[B] Diamond to glass

[C] Air to water

[D] Water to glass

Q48. The basic reason for the extraordinary sparkle of suitably cut diamond is that

[A] it has a very high refractive index

[B] it has a very high transparency

[C] it is very hard

[D] it has well defined cleavage planes

Q49. Which of the following, can neither be created nor be destroyed?

[A] Momentum

[B] Energy

[C] Power

[D] Force

Q50. The minimum number of Non zero non collinear vectors required to produce a zero vector is

[A] 1

[B] 3

[C] 2

[D] 4