ElectrostaticsHard
Question
Figure shows two large cylindrical shells having uniform linear charge densities +λ and −λ. Radius of inner cylinder is ′a′ and that of outer cylinder is ′b′. A charged particle of mass m, charge q revolves in a circle of radius r. Then, its speed ′v′ is : (Neglect gravity and assume the radii of both the cylinders to be very small in comparison to their length.)
Options
A.
B.
C.
D.
Solution
Using Gauss′s law for Gaussian surface shown in figure.
; E . 2πrl = 
∴ E = 
For circular motion.
qE =
∴ V = 
Create a free account to view solution
View Solution FreeMore Electrostatics Questions
An elementary particle of mass m and charge +e is projected with velocity v at a much more massive particle of charge Ze...A square of side 20 cm is enclosed by a surface of sphere of 80 cm radius. Square and sphere have the same centre. Four ...Two equal and like charges when placed 5 cm apart experience a repulsive force of 0.144 newton. The magnitude of the cha...An equipotential surface and an electric line of force :...Two parallel plates separated by a distance of 5 mm are kept at a potential difference of 50 V. A particle of mass 10-15...