Two capacitors having capacitances C₁ and C₂ are charged with 120V and 200V batteries respectively. When they are connectd in parallel now, it is found that the potential on each one of them is zero. […]
Equal charge q each are placed at the vertices AQ and B of an equilateral triangle ABC of side a. The magnitude of electric intensity at the point C is
Options
(a) q/4πε₀a² […]
Two parallel metal plates having charges +Q and -Q face each other at a certain distance between them. If the plates are now dipped in kerosene oil tank, the electric field between the plates will […]
The electric potential V at any point (x,y,z) all in meters in space is given by V = 4x² volt. The electric field at the point (1,0,2) in V/m is
Options
(a) 8 […]
Two identical capacitors are first connected in series and then in parallel. The ratio of equivalent capacitance is
Options
(a) (1:1) (b) (1:2) (c) (1:3) (d) (1:4)
Correct Answer:
(1:4)
Explanation:
No explanation […]
Electrical force is acting between two charges kept in vacuum. A copper plate is placed between the charges, the force now is
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(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 […]
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