Electric Charges and Fields questions
340 published questions with worked solutions.
- A certain charge Q is divided into two parts q and (Q – q). How should the charges Q and q be divided so that q and (Q – q)...
- The total charge enclosed in an incremental volume of 2 10^ -9 m^3 located at the origin is _______nC, if electric flux density...
- Two particles A and B having charges 20 and –5 respectively are held fixed with a separation of 5 cm. At what position a third...
- Two small spheres each of mass 10 mg are suspended from a point by threads 0.5 m long. They are equally charged and repel each...
- Two identical conducting spheres with negligible volume have charges 2.1 nC and –0.1 nC, respectively. They are brought into...
- The electric field in a region is given by E = ( 3 5 E_0 i + 4 5 E_0 j ) N C . The ratio of flux of reported field through the...
- Given below are two statements : Statement I : An electric dipole is placed at the centre of a hollow sphere. The flux of...
- A vertical electric field of magnitude 4.9 10^ 5 N/C just prevents a water droplet of a mass 0.1 g from falling. The value charge...
- Two identical charged particles each having a mass 10 g and charge 2.0 10^ -7 C are placed on a horizontal table with a...
- The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by :
- The volume charge density of a sphere of radius 6 m is 2 C cm^ -3 . The number of lines of force per unit surface area coming out...
- Choose the incorrect statement : (a) The electric lines of force entering into a Gaussian surface provide negative flux. (b) A...
- A cubical volume is bounded by the surfaces x = 0, x = 0, x = a, y = 0, y = a, z = 0, z = a. The electric field in the region is...
- Two equal positive point charges are separated by a distance 2a. The distance of a point from the centre of the line joining two...
- A small particle of mass m moves in such a way that its potential energy U = 1 2 m ^2r^2 where is constant and r is the distance...
- A tiny spherical oil drop carrying a net charge q is balanced in still air with a vertical uniform electric field of strength 81...
- Let E_1(r), E_2(r) and E_3(r) be the respective electric fields at a distance r from a point charge Q, an infinitely long wire...
- A charged shell of radius R carries a total charge Q. Given as the flux of electric field through a closed cylindrical surface of...
- Suppose a rod is given a negative charge by rubbing it with wool. Which one of the following statements is correct in this case ?
- A positive charge +q is placed at the centre of a hollow metallic sphere of inner radius a and outer radius b. The electric field...
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