[ONLINE QUESTIONS]
[2017][2017][2017]The energy stored in the electric field produced by
a metal sphere is 4.5 J. If the sphere contains 4 C
charge, its radius will be:
(a) 32 mm (b) 16mm (c) 28 mm (d) 20 mm
There is a uniform electrostatic field in a region.The
potential at various points on a small sphere centred
at p, in the region, is found to vary between in
limits 589.0V to 589.8V. What is the potential at a
point on the sphere whose radius vector makes an
angle of 600 with the direction of the field?
(a) 589.4 V (b) 589.5 V (c) 589.2 (d) 589.6 V
Four closed surfaces and corresponding charge
distributions are shown below. Let the respective
electric fluxes through the surfaces be 1 , , , 2 3
and 4. Then.ELECTRO STATICS
(a) 1 2 3 4 (b) 1 2 3 4
(c) 1 3 ; 2 4 (d) 1 2 3 4
The potential (in volts) of a charge distribution is
given by V(z) 30 5z^2 for | z | 1m
V(z) 35 10 | z | for | z | 1m
V(z) does not depend on x and y. If this potential is
generated by a constant charge per unit volume
, (in units of ) which is spread over certain
region, then choose the correct statement.(a) (^40) in the entire region.
(b) (^20) in the entire region.
(c) (^20) for |z|1m and 0 else where.
(d) (^10) for |z| 1m and 0 else where.
A wire of length L(= 20 cm), is bent into a
semicircular arc. If the two equal halves of the arc
were each to be uniformly charged with charges
Q,[ Q 10^3 0 Coulomb where 0 is the
permittivity(in SI units) of free space] the net electric
field at the centre O of the semicircular arc would
be:
4.
[2016]
5.
[2015]