The magnetic lines of force inside a bar magnet: (A) Are from north-pole to south-pole of the magnet (B) Do not exist (C) Depends upon the area of cross-section of the bar magnet (D) Are from south-pole to north-pole of the magnet

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?