A small oil drop of mass 10⁻⁶kg is hanging in at rest between two plates seperated by 1mm having a potential difference of 500 V. The charge on the drop is (g=10ms⁻²)
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A parallel plate condenser has a uniform electric field E(V/m) in the space between the plates. If the distance between the plates is d(m) and area of each plate is A(m²) the energy (joules) stored […]
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
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(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
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(a) 8 […]
Two identical capacitors are first connected in series and then in parallel. The ratio of equivalent capacitance is
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(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
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(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 […]
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