A spherical conducting shell has a radius of and charge
of . A point is located inside the shell at a distance from
the centre of the sphere, where . What is the electric potential
at point ?
(e) Not enough information
In a certain spherically symmetric system, the electric
potential as a function of the distance from the centre is
shown in Fig. 1. Which of the following
statements is FALSE?
(a) The electric field is positive (in the radial direction)
between and .
(b) A particle with a positive charge which has a kinetic energy
of larger than at will have a kinetic energy of
(c) The electric field is zero at and .
(d) A particle with a negative charge located at will be
accelerated towards the centre ().
(e) None of the above.
Figure 2 shows a voltage-charge (-)
diagram of the process of charging a certain capacitor, from the point
to the point . What is the total work required for this
process? One unit of voltage and charge is
and respectively in the graph.
(a) (b) (c) (d) (e) You
cannot determine the work from this diagram alone.
electrons pass through a
resistor in 10
min, what is the potential difference across the resistor?