ElectrostaticsHard
Question
Figure (a) shows an imaginary cube of edge length L. A uniformly charged rod of length 2L moves towards left at a small but constant speed v. At t = 0, the left end of the rod just touches the centre of the face of the cube opposite to it. Which of the graphs shown in fig.(b) represents the flux of the electric field through the cube as the rod goes through it ?
(a)
(b)
(a)
(b)Options
A.a
B.b
C.c
D.d
Solution
From stage 1 to stage 2 ⇒ enclosed charge is increasing means flux is increasing
From stage 2 to stage 3 ⇒ enclosed charge is constant means flux is constant
From stage 3 to stage 4 ⇒ enclosed charge is decreasing means flux is decreasing
Create a free account to view solution
View Solution FreeMore Electrostatics Questions
A hollow conducting sphere is placed in an electric field produced by a point charge placed at p as shown in figure. Let...The force between two short electric dipoles separated by a distance r is directly proportional to :...Two charges of equal magnitude q are placed at a distance 2a. Another charge q of mass m, is placed midway between the t...A non-conducting solid sphere of radius R is uniformly chaged. The magnitude of the electric field due to the sphere at ...Two charges 16μC and - 4μC are placed at seperation 27 cm, then distance of the point from - 4 μC where e...