Home › JEE Advanced › Physics › Electromagnetism › At an axial point of an electric dipole at dista…
At an axial point of an electric dipole at distance r >> a (a = dipole half-length, p = qa·2 the dipole moment), E equals:
Akp/r²
B2kp/r³
Ckp/r³
D-2kp/r³
Answer & Solution
Correct answer: B. 2kp/r³
E_axial = 2kp/r³ along the dipole axis. (Compare to equatorial: E = -kp/r³ — half the magnitude, opposite direction.)
Related questions
Certain galvanometers use eddy currents to provide electromagnetic:The SI unit of inductance is the:Eddy current flow patterns are said to resemble swirling eddies in:Foucault lived from 1819 until:Who discovered eddy currents?Swirling induced currents in a metal plate are called:What in Faraday's equation represents Lenz's law?Lenz's law says the induced current opposes the change in: