All articles filed under Quiz.
The focal length of an equiconvex lens (A) increases when the lens is dipped in water. (B) increase…
The radii of curvature of two surfaces of a convex lens are R and 2R. If the focal length of this l…
A thin converging lens of focal length 20 cm and a thin diverging lens of focal length 15 cm are pl…
An ac voltage V = 0.5 sin (100 rt) volt is applied, in turn, across a half-wave rectifier and a ful…
Initially during the formation of a p-n junction – (A) diffusion current is large and drift current…
During the formation of a p-n junction – (A) electrons diffuse from p-region into n-region and hole…
At a given temperature, the number of intrinsic charge carriers in a semiconductor is 2.0 x 1010 cm…
When Ge is doped with pentavalent impurity, the energy required to free the weakly bound electron f…
What are ferromagnetic materials ? Explain ferromagnetism with the help of suitable diagrams, using…
(i) Define mutual inductance. Write its SI unit. (ii) Derive an expression for the mutual inductanc…
Name the electromagnetic waves with their wavelength range which are used for (i) FM radio broadcas…
A circular loop of radius 10 cm carrying current of 1.0 A lies in x-y plane. A long straight wire l…
