Related InterviewSolutions

• A 6 μF capacitor is charged by a 100V supply. It is then disconnected from the supply and μ is connected to another uncharged 3μF capacitor. How much electrostatic energy of the first capacitor is dissipated in the form of heat and electromagnetic radiation?(a) 3 x 10^-2 J(b) 2 x 10^-2 J(c) 1 x 10^-2 J(d) 4 x 10^-2 JI got this question in exam.Origin of the question is Energy Stored in a Capacitor topic in division Electrostatic Potential and Capacitance of Physics – Class 12
• How does the capacitance change with the effect of the dielectric when the battery remains connected across the capacitor?(a) Increases(b) Decreases(c) Zero(d) Remains constantI got this question by my school teacher while I was bunking the class.My question comes from Effect of Dielectric on Capacitance in chapter Electrostatic Potential and Capacitance of Physics – Class 12
• In a parallel plate capacitor, the capacitance increases from 100 F to 800 F, on introducing a dielectric medium between the plates. What is the dielectric constant of the medium?(a) 0.125(b) 125(c) 80(d) 8This question was addressed to me in a national level competition.My question is from Effect of Dielectric on Capacitance topic in portion Electrostatic Potential and Capacitance of Physics – Class 12
• What is the dielectric constant of the medium if the capacitance of a parallel plate capacitor increases from 40F to 80F on introducing a dielectric medium between the plates?(a) 20(b) 0.5(c) 2(d) 5This question was addressed to me in a national level competition.My question is based upon Effect of Dielectric on Capacitance topic in section Electrostatic Potential and Capacitance of Physics – Class 12
• How is the electric field at the surface of a charged conductor related to the surface charge density?(a) Proportional to each other(b) Indirectly proportional(c) Independent(d) ExponentialI have been asked this question in my homework.The question is from Electrostatics of Conductors in section Electrostatic Potential and Capacitance of Physics – Class 12
• Which of the following statements is correct?(a) An electric field is a scalar quantity(b) Electric field lines are at 45 degrees to the equipotential surfaces(c) The surface of a charged conductor is equipotential(d) Field lines due to a point charge are circularI got this question by my college professor while I was bunking the class.My doubt is from Equipotential Surfaces topic in chapter Electrostatic Potential and Capacitance of Physics – Class 12
• A small charge q is rotated in a complete circular path of radius r surrounding another charge Q. The work done in this process is _________(a) Zero(b) \(\frac {qQ}{4\pi \varepsilon r}\)(c) \(\frac {q}{4\pi \varepsilon (\pi r)}\)(d) \(\frac {q}{4\pi \varepsilon (2\pi r)}\)This question was addressed to me during a job interview.My query is from Electrostatic Potential due to a Point Charge topic in chapter Electrostatic Potential and Capacitance of Physics – Class 12
• A Van de Graff generator can kill a person.(a) True(b) FalseThis question was addressed to me in an interview for internship.Question is from Van de Graff Generator in section Electrostatic Potential and Capacitance of Physics – Class 12
• How does the potential difference change with the effect of the dielectric when the battery remains connected across the capacitor?(a) Increases(b) Decreases(c) Remains constant(d) Becomes zeroThis question was addressed to me during an interview for a job.The query is from Effect of Dielectric on Capacitance in division Electrostatic Potential and Capacitance of Physics – Class 12
• Find out the correct expression of the capacitance of a parallel plate capacitor where ‘A’ is the area of the plates, ‘d’ is the distance between the plates and ‘ε0’is the permittivity of the medium.(a) \(\frac {A\varepsilon_0}{d}\)(b) \(\frac {Ad}{\varepsilon_0}\)(c) \(\frac {d\varepsilon_0}{A}\)(d) Aε0dI got this question in semester exam.My question is based upon Parallel Plate Capacitor in chapter Electrostatic Potential and Capacitance of Physics – Class 12