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
What is the meaning of wavelength? Wavelength is the distance between two successive troughs or two successive crests. The crest is the highest... View Article
Which lens is called a diverging lens?Concave lens is called a diverging lens. The working of the lens is dependent on the refraction of the... View Article
Gravitational force or gravity is one of the basic forces of nature. The gravitational force is an attractive force between any two objects in... View Article
Galvanometer is a device used to detect and measure the magnitude of small current. It is mainly used in potentiometers and bridges, where they... View Article
A transverse wave is a wave in motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's... View Article
