Types Of Questions

## Electric Charges And Fields

- Wondering what kind of questions that can be asked in the next exam? Here you go!
1
Very Short Answer Type Questions 1mark
Define one "Coulomb" on the basis of Coulomb's law.
A solid metallic sphere is placed in a uniform electric field. Which of the curves shown in figure represent the lines of force correctly?
A
B
C
D
Two large parallel planes charged uniformly with surface charge densities and are located as shown in the figure. Which one of the following graphs shows the variation of electric field along a line perpendicular to the planes as one moves from A to B?
A
B
C
D
2
Short Answer Type Questions -I 2marks
Two charges and are placed 30 cm apart. Find the strength of electric field at the mid point between them.
In a Millikan's oil drop method, a charged drop of oil has mass m and charge q. It is made stationary by applying an electric field E. Find the strength of the electric field. If the result of Millikans experiment with different drops is find the elementary charge.
If be the electric field intensity due to a short dipole at a point on the axis and be that on the right bisector at the same distance from the dipole, then
A
B
C
D
3
Short Answer Type Questions - II 3marks
An electric dipole with dipole moment C m is aligned at with the direction of a uniform electric field of magnitude . Calculate the magnitude of the torque acting on the dipole.
Three equal changes each, are held fixed at the three corners of an equilateral triangle of side 5 cm. Find the Coulomb force experienced by one of the charges due to the rest two.
The electric field in a region is radially outward with magnitude . Calculate the charge contained in a sphere of radius R centered at the origin. Calculate the value of the charge if and R=0.30 m.
A
B
C
D
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