Question
An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is σ Electric intensity in the space between the plates is E .A uniform magnetic field also exists in the space perpendicular to the direction of E The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance I in the space is
The correct answer is:
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From the following given statements of the order of dipolemoments.
i)
ii)
iii) 
The correct combination is
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i)
ii)
iii)
The correct combination is
Two parallel-plate capacitors of capacitance C and 2C are connected in parallel and charged to potential difference V . The battery is then disconnected and the region between the plates of C is filled completely with a material of dielectric constant K. The common potential difference across the combination becomes
Two parallel-plate capacitors of capacitance C and 2C are connected in parallel and charged to potential difference V . The battery is then disconnected and the region between the plates of C is filled completely with a material of dielectric constant K. The common potential difference across the combination becomes
A slab of dielectric constant 
and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be
, made of two semicircular rings having linear charge densities 
and 
as shown in Figure.
and 
(Fig). Each capacitor has capacitance C.
, the electrostatic potential energy of the system is zero?
represent the electric potential at the points A, B and C respectively.
in the figure, shown is
