Charges –q and +q located at A and B, respectively, constitude an… | JEE Main 2019 (10 Jan, Shift 2)

Q66JEE Main 2019 · 10 JAN · SHIFT 2Medium

Electric Dipole

Charges –q and +q located at A and B, respectively, constitude an electric dipole. Distance AB = 2a, O is the mid point of the dipole and OP is perpendicular to AB. A charge Q is placed at P where OP = y and y >> 2a. The charge Q experiences an electrostatic force F. If Q is now moved along the equatorial line to P' such that OP' = $\left(\frac{y}{3}\right)$ , the force on Q will be close to - $\left(\frac{y}{3} \gg 2a\right)$

Show answer and solution

Answer: (d)

Far on the equatorial line $E = \frac{kp}{y^3}$ , so $F = QE \propto \frac{1}{y^3}$ .
$y \to \frac{y}{3}$ : $F' = 3^3 F = 27F$
So the answer is (d) $27F$ .

Report a mistake

More questions on Electric Dipole

An electric dipole is formed by two equal and opposite charges q with separation d. The…JEE Main 2019 (8 Apr, Shift 2)
Two electric dipoles, A, B with respective dipole moments dA = -4qai and dB = -2qai are…JEE Main 2019 (10 Jan, Shift 1)
An electric dipole has a fixed dipole moment p, which makes angle θ with respect to…JEE Main 2017
An electric dipole is placed at an angle of 30o with an electric field intensity 2 × 105…NEET 2016 (Phase 2)
An electric dipole of dipole moment p is aligned parallel to a uniform electric field E…NEET 2013
Two point dipoles of dipole moment p₁ and p₂ are at a distance x from each other and p₁ ∥…JEE Main 2013 (9 Apr, Shift 1)
An electric dipole of moment p is placed in an electric field of intensity E. The dipole…NEET 2012 (AIPMT, Prelims)
An electric dipole of moment p is lying along a uniform electric field E. The work done…NEET 2006 (AIPMT)

Electric Dipole question from JEE Main 2019 (10 Jan, Shift 2)

More questions on Electric Dipole