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