A charge is distributed along an infinite curved line in space with linear charge distribution λ. What will be the amount of force on a point charge q kept at a certain distance from the line?(a) q∫\(\frac {\lambda}{r^2}\hat{r}\)dl(b) q∫\(\frac {\lambda}{r^2}\hat{r}\)dr(c) q∫\(\frac {\lambda}{r^3}\hat{r}\)dl(d) q∫\(\frac {\lambda}{r^2}\)I have been asked this question in an internship interview.Query is from Continuous Charge Distribution topic in section Charges and Fields of Physics – Class 12

A charge is distributed along an infinite curved line in space with li

1.	A charge is distributed along an infinite curved line in space with linear charge distribution λ. What will be the amount of force on a point charge q kept at a certain distance from the line?(a) q∫\(\frac {\lambda}{r^2}\hat{r}\)dl(b) q∫\(\frac {\lambda}{r^2}\hat{r}\)dr(c) q∫\(\frac {\lambda}{r^3}\hat{r}\)dl(d) q∫\(\frac {\lambda}{r^2}\)I have been asked this question in an internship interview.Query is from Continuous Charge Distribution topic in section Charges and Fields of Physics – Class 12
Answer» Correct CHOICE is (a) q∫\(\frac {\lambda}{r^2}\hat{r}\)dl The BEST EXPLANATION: Let the point charge is situated at a distance r from a small part dl on the LINE. The charge stored in stat small part=λ.dl. The force due to that small part will be DIRECTED towards the unit vector \(\hat{r}\). Therefore, force on that charge due to the entire linear charge distribution=q∫\(\frac {\lambda}{r^2}\hat{r}\)dl.

Discussion

No Comment Found

Related InterviewSolutions

A charge is distributed along an infinite curved line in space with linear charge distribution λ. What will be the amount of force on a point charge q kept at a certain distance from the line?(a) q∫\(\frac {\lambda}{r^2}\hat{r}\)dl(b) q∫\(\frac {\lambda}{r^2}\hat{r}\)dr(c) q∫\(\frac {\lambda}{r^3}\hat{r}\)dl(d) q∫\(\frac {\lambda}{r^2}\)I have been asked this question in an internship interview.Query is from Continuous Charge Distribution topic in section Charges and Fields of Physics – Class 12
What is the dimension of the dipole moment?(a) [L T I](b) [L T I^2](c) [M L T I](d) [L T I^-1]This question was posed to me in an online interview.The doubt is from Electric Dipole topic in section Charges and Fields of Physics – Class 12
Which among the following molecule is not a dipole?(a) NH3(b) H2O(c) HCl(d) CH4The question was posed to me during a job interview.This key question is from Electric Dipole in chapter Charges and Fields of Physics – Class 12
The direction of electric field created by a negative charge is ___________(a) Directed outwards(b) Directed towards the charge(c) Maybe outwards or towards the charge(d) Circular in shapeI have been asked this question in exam.This question is from Electric Field in section Charges and Fields of Physics – Class 12
An electric field E is present perpendicular to a square plate of side length L. What is the flux passing through the plate?(a) LE(b) L^2E(c) \(\frac {L^2}{E}\)(d) ZeroThe question was posed to me by my college professor while I was bunking the class.The query is from Gauss’s Law in section Charges and Fields of Physics – Class 12
Let B be the midpoint of AC. Two point charges Q are placed at A and C. What should be the value of charge placed at B so that the system remains at equilibrium?(a) –Q/2(b) –Q/4(c) +Q/2(d) +Q/4I have been asked this question in my homework.My question comes from Coulomb’s Law in section Charges and Fields of Physics – Class 12
Electric field due to a uniformly charged hollow sphere at a distance of r (where r is greater than the radius of the sphere) is __________(a) Proportional to r(b) Inversely proportional to r(c) Proportional to r^2(d) Inversely proportional to r^2The question was asked in an interview for job.My question is based upon Electric Field in division Charges and Fields of Physics – Class 12
What is the dimension of volume charge density?(a) [MLAT^-2](b) [M^0 L^-3 A T](c) [M L^-3 A T](d) [M L^-2 A T]I had been asked this question in an online quiz.This is a very interesting question from Basic Properties of Electric Charge in section Charges and Fields of Physics – Class 12
An electric field \(3\hat{j} + 4\hat{k}\) N/C is present at a place. What will be the electric flux passing through a square plate if the plate is placed in the y-z plane?(a) 7 Nm^2C^-1(b) 25 Nm^2C^-1(c) Zero(d) 17 Nm^2C^-1I have been asked this question by my college director while I was bunking the class.This intriguing question comes from Gauss’s Law topic in chapter Charges and Fields of Physics – Class 12
Net inward and outward flux of a closed surface are φ1 and φ2. What is the charge enclosed inside the surface?(a) Zero(b) -(∅1-∅2)εo(c) (∅1-∅2)εo(d) \(\frac {(\emptyset_1 + \emptyset_2)}{\varepsilon_o}\)This question was addressed to me during an internship interview.This is a very interesting question from Gauss’s Law in division Charges and Fields of Physics – Class 12

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment