Define magnifying power of telescope. Write its expression. A small telescope has an objective lens of focal length 150cm and an eye piece of focal length 5cm. if this telescope is used to view 100m high towers 3km away. Find the height of the final image when it is formed 25cm away from the eye piece.

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?