Electric Charges and Fields questions
340 published questions with worked solutions.
- The Gaussian surface needed for calculating the electric field due to a charge distribution is
- Which of the following law gives a relation between the electric flux through any closed surface and the charge enclosed by the...
- A point charge causes an electric flux of -200 N ,m^2/C to pass through spherical Gaussian surface of 10 cm radius centered on...
- A cubical gaussian surface encloses 24 C of charge. The electric flux through each surface of the cube is
- The magnitude of electric intensity at a point which is at a distance 'r' from the centre of a charged spherical conductor of...
- A point charge 'q' is placed at origin. Let E_B and E_C be the electric field at points B (1, 1, -1) and C (2, 2, 2) due to...
- An infinite line charge produces a field of 9 10^4 N/C at a distance of 4 cm. The linear charge density is
- Two charged concentric spheres have radii of 10 cm and 14 cm. Charge on the inner sphere is +4 10^ -8 C and that on the outer...
- A cylinder of radius 4 mm and surface density of charge 0.25 C/m^2 is surrounded by a medium of dielectric constant 6.28. The...
- The surface charge density of a conductor is 12 10^ -12 C/m^2 . If the conductor is surrounded by a medium of dielectric constant...
- A conducting sphere of radius 0.1 m has a uniform positive charge density of 1.8 C/m^2 on its surface. The electric field in V/m...
- The insulation property of air breaks down at E = 3 10^ 6 per metre. The maximum charge that can be given to a sphere of diameter...
- The number of electrons to be put on a spherical conductor of radius 0.1 m to produce an electric field of 0.036 N/C just above...
- The solid angle subtended at the centre of a sphere by the total surface area of sphere is :
- The solid angle subtended by a small surface area ds at a point inside the entire surface at a distance r where ds makes an angle...
- Which of the following mathematical statement of Gauss theorem (q – charge, – permittivity of medium around a charge q)
- For a given surface, the Gauss's law is stated as E ds = 0. From this result we conclude that:
- The charge density on the surface of conducting sphere is 64 10^ -7 C/m^2 . The electric intensity at a distance of 2 m from the...
- The ratio between electric intensity E_s and E_c at a point outside of sphere and charged cylinder of length at the same distance...
- A hollow sphere of charge does not produce an electric field at any
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