The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is
Options
(a) ε₀E² […]
What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
Options
(a) scalar (b) electrical (c) Magnetic (d) Vector
Correct Answer:
Vector
Explanation:
The Gauss’s law in electrostatics gives a relation […]
Three capacitors 3μF, 6μF and 6μF are connected in series to a source of 120V. The potential difference in volt, across the 3μF capacitor will be
Options
(a) 24V (b) 30V (c) 40V […]
The electric potential at a point in free space due to a charge Q coulomb is Q x 10¹¹ volts. The electric field at that point is
Options
(a) 4π?￢ﾂﾀQ x 10²² volt/m […]
An electric dipole placed in a non-uniform electric field experiences
Options
(a) Both a torque and a net force (b) Only a force but no torque (c) Only a torque but no net […]
what is the electric potential at a distance of 9cm from 3nC?
Options
(a) 270V (b) 3V (c) 300V (d) 30V
Correct Answer:
300V
Explanation:
Given, q = 3 nC = 3 × 10⁻⁹ […]
An electric dipole of dipole moment p is placed in a uniform external electric field E. Then the,
Options
(a) torque experienced by the dipole is E x p (b) torque is zero, […]
Two equal and opposite charges of masses m₁ and m₂ are accelerated in a uniform electric field through the same distance. What is the ratio of their accelerations, if their ratio of masses is m₁/m₂=0.5? […]
Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
Options
(a) 2.3×10⁻⁸ N (b) 4.6×10⁻⁸ N (c) 1.5×10⁻⁸ N (d) None of these
Correct Answer:
2.3×10⁻⁸ […]
Consider two concentric spherical metal shells of radii r₁ and r₂( r₂>r₁). If the outer shell has a charge q and the inner one is grounded, then the charge on the inner shell is
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