Given1, a1, a2,...an-1 are the nth roots of unity. So xn-1= (x-1)(x-a1)...(x-an-1) ( xn-1)/(x-1) = (x-a1)(x-a2)...(x-an-1) xn-1+xn-2+...x2+x+1... View Article
Why are pole pieces of galvanometer made concave? The pole pieces of the galvanometer are made concave so that the current-carrying coil and the... View Article
Why ac is dangerous than dc?. Alternating current (A.C) is five times more dangerous than Direct current (D.C). The frequency of the alternating... View Article
Vernier caliper is an amazing instrument used for measuring lengths. The reading on a vernier caliper is more accurate than a normal ruler. This... View Article
What is the function of a voltmeter? A voltmeter is an instrument used for measuring the voltage or potential difference between two points in an... View Article
What is the meaning of thermodynamics?. Thermodynamicsis the branch of physics which deals with the energy relationships involving heat,... View Article
The junction between the p-type semiconductor and the n-type semiconductor is called the PN-junction. The majority charge carriers in a p-type... View Article