Physics- Basic General Knowledge questions and answers

1.Rain drop starts to fall down when the velocity of the drop is

equal to terminal velocity greater than terminal velocity less than terminal velocity greater than critical velocity

2.Which of the following is acts to reduce the temperature of the spring in MRI scanning?

Liquid Nitrogen Liquid Hydrogen Liquid Sodium Liquid Helium

3.Liquid helium can reduce the temperature of the coil in MRI equipment to around

40 K 4 K 273 K 0 degree C

4.In 1905, Albert Einstein discovered

Photoelectric effect and Brownian motion 

Brownian motion and special theory of relativity 

Special theory of relativity and photoelectric effect 

Photoelectirc effect, special theory relativity and Brownian motion

5.Sound waves from a sounding car are

transverse waves longitudinal waves ultrasonic waves stationary waves