Find the current density of a material with resistivity 20 units and electric field intensity 2000 units.(a) 400(b) 300(c) 200(d) 100I have been asked this question in class test.This intriguing question originated from Real Time Applications in chapter Electrostatic Fields of Electromagnetic Theory

Find the current density of a material with resistivity 20 units and e

1.	Find the current density of a material with resistivity 20 units and electric field intensity 2000 units.(a) 400(b) 300(c) 200(d) 100I have been asked this question in class test.This intriguing question originated from Real Time Applications in chapter Electrostatic Fields of Electromagnetic Theory
Answer» The correct answer is (d) 100 The best explanation: The CURRENT density is given by J = σ E, where σ is the CONDUCTIVITY. THUS resistivity ρ = 1/σ. J = E/ρ = 2000/20 = 100 UNITS.

Discussion

No Comment Found

Related InterviewSolutions

Three charged cylindrical sheets are present in three spaces with σ = 5 at R = 2m, σ = -2 at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 3m.(a) 3(b) 10/3(c) 11/3(d) 4I had been asked this question in class test.I need to ask this question from Applications of Gauss Law in chapter Electrostatic Fields of Electromagnetic Theory
Three charged cylindrical sheets are present in three spaces with σ = 5 at R = 2m, σ = -2 at R = 4m and σ = -3 at R = 5m. Find the flux density at R = 1m.(a) 0(b) 1(c) 2(d) 3I had been asked this question in an international level competition.My question is taken from Applications of Gauss Law topic in division Electrostatic Fields of Electromagnetic Theory
The potential of a coaxial cylinder with charge density 1 unit , inner radius 1m and outer cylinder 2m is (in 10^9)(a) 12.74(b) 13.47(c) 12.47(d) 13.74This question was posed to me in final exam.I need to ask this question from Gauss Law topic in section Electrostatic Fields of Electromagnetic Theory
The work done by a charge of 10μC with a potential 4.386 is (in μJ)(a) 32.86(b) 43.86(c) 54.68(d) 65.68I had been asked this question by my school principal while I was bunking the class.This is a very interesting question from Gauss Law in portion Electrostatic Fields of Electromagnetic Theory
Find the susceptibility of a material whose dielectric constant is 2.26.(a) 1.26(b) 3.26(c) 5.1(d) 1The question was posed to me in class test.The origin of the question is Electrostatic Properties in portion Electrostatic Fields of Electromagnetic Theory
The bound charge density and free charge density are 12 and 6 units respectively. Calculate the susceptibility.(a) 1(b) 0(c) 2(d) 72This question was addressed to me in an international level competition.This intriguing question originated from Electrostatic Properties topic in section Electrostatic Fields of Electromagnetic Theory
The susceptibility of free space is(a) 1(b) 0(c) 2(d) ∞I got this question during an interview.Question is taken from Electrostatic Properties in division Electrostatic Fields of Electromagnetic Theory
Semiconductors possess which type of bonding?(a) Metallic(b) Covalent(c) Ionic(d) MagneticI had been asked this question in class test.This key question is from Electrostatic Properties topic in portion Electrostatic Fields of Electromagnetic Theory
Which of the following properties distinguish a material as conductor, insulator and semiconductor?(a) Free electron charges(b) Fermi level after doping(c) Energy band gap(d) Electron densityThis question was posed to me in examination.This question is from Electrostatic Properties in chapter Electrostatic Fields of Electromagnetic Theory
Dielectric constant will be high in(a) Conductors(b) Semiconductors(c) Insulators(d) SuperconductorsThe question was asked during an interview for a job.My question comes from Electrostatic Properties topic in portion Electrostatic Fields of Electromagnetic Theory

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment