Electrical force is acting between two charges kept in vacuum. A copper plate is placed between the charges, the force now is
Options
(a) more (b) less but not zero (c) remains unchanged […]
An electron having charge e and mass m is moving in a uniform electric field E. Its acceleration will be
Options
(a) e²/m (b) E²e/m (c) eE/m (d) mE/e
Correct Answer:
eE/m
Explanation: […]
A series combination of n₁ capacitors, each of value C₁, is charged by a source of potential difference 4 V. When another parallel combination of n₂ capacitors, each of value C₂, is charged by a […]
A point charge q is placed at a distance x/2 directly above the centre of a cube of side x. The flux through the cube is
Options
(a) q/ε₀ (b) q/2ε₀ (c) q/4ε₀ […]
The electric field at a distance 3R / 2 from the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance R/2 from the centre of the […]
The force of repulsion between two electrons at a certain distance is F. The force between two protons separated by the same distance is (mp=1836mₑ)
Options
(a) 2F (b) F (c) 1836F (d) […]
The electric potential at a point (x,y,z) is given by V = – x²y – xz³ + 4. The electric field E⃗ at that point is
Options
(a) E⃗ = i 2xy + […]
Two point charge +9e and +e are at 16 cm away from each other. Where should another charge q be placed between them so that the system remains in equilibrium?
Options
(a) 24 […]
The net electric force on a charge of +3μC at the mid-point on the line joining two charges of magnitude +2μC and -2μC seperated by the same distance of 6mm, is
Options
(a) 6000N […]
Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be ( […]
2017 Copyright Doctor Dreams Training Academy