Electronic energy is negative because: A. Electron has negative charge B. Energy is zero near the nucleus and decreases as the distance from the nucleus increases C. Energy is zero at infinite distance from the nucleus and decreases as the electron comes towards the nucleus. D. These are interelectronic repulsions

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?