In a photoelectric experiment the stopping potential for the photoelectron is 2V for the incidence of wavelength 400nm . If the incidence the light is changed to 300nm , the cut-off potential is A) 2V B) Greater than8/3V C) 8/3V D) Zero

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?