Three capacitors each of capacitance C and of breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination will be
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(a) 3C, V/3 (b) C/3, 3V (c) […]
Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively. If they are connected by the wire, then what is the common potential of the capacitors?
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(a) 133.3V […]
An Electric charge does not have which of the following properties?
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(a) Total charge conservation (b) Quantisation of charge (c) Two types of charge (d) Circular line of force
Correct Answer:
Circular line […]
The mean free path of electrons in a metal is 4 x 10⁻⁸ m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in […]
The capacitance of two concentric spherical shells of radii R₁ and R₂ (R₂>R₁) is
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(a) 4πε₀R₂ (b) 4πε₀(R₂-R₁)/R₁R₂ (c) 4πε₀R₁R₂/(R₂-R₁) (d) 4πε₀R₁
Correct Answer:
4πε₀R₁R₂/(R₂-R₁)
Explanation:
No explanation available. Be the first […]
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
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(a) ε₀E² […]
What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
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(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
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(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
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(a) 4π?￢ﾂﾀQ x 10²² volt/m […]
An electric dipole placed in a non-uniform electric field experiences
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(a) Both a torque and a net force (b) Only a force but no torque (c) Only a torque but no net […]
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