Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
What is Colours of bodies ?
What is a Pressure ?
Why dies a boat-man push the bank with an oar, when he wants to clear his boat off the bank?
What is dispension of light?
What is Translucent body ?
How much oxygen is in the atmosphere?
Mention the applications of electron microscope. : quantum physics
Why do we not feel the enormous weight of the atmosphere above our heads ?
Explain the difference between intrinsic and extrinsic semiconductors?
how sunlight produce e.m wave in vacuum?
Why does heated air expand?
In any current connection there are two wires one is phase and another is neutral, what is the use of neutral wire?