Student Login

Home›Chapters›Electrostatics PYQs›Electric Charge & Coulomb's Law›Question 69

NEET 2013 · Electric Charge & Coulomb's Law

Electric Charge & Coulomb's Law question from NEET 2013

Q69NEET 2013Easy

Electric Charge & Coulomb's Law

A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to

Show answer and solution

Answer: (a)

For an end charge $Q$ (separation $2r$ ): $\dfrac{kQ^2}{(2r)^2} + \dfrac{kQq}{r^2} = 0$ .
$q = -\dfrac{Q}{4}$
So the answer is (a) $-Q/4$ .

Report a mistake

More questions on Electric Charge & Coulomb's Law

Two pith balls carrying equal charges are suspended from a common point by strings of…NEET 2013
Two small equal point charges of magnitude q are suspended from a common point on the…JEE Main 2013 (22 Apr, Shift 1)
Two balls of same mass and carrying equal charge are hung from a fixed support by threads…JEE Main 2013 (9 Apr, Shift 1)
Two identical charged spheres suspended from a common point by two massless strings of…JEE Main 2011 (AIEEE)
Two positive ions, each carrying a charge q, are separated by a distance d. If F is the…NEET 2010 (AIPMT, Prelims)
Two identical charged spheres are suspended by strings of equal lengths. The strings make…JEE Main 2010 (AIEEE)
A charge Q is placed at each of the opposite corners of a square. A charge q is placed at…JEE Main 2009 (AIEEE)
Two spherical conductors B and C having equal radii and carrying equal charges on them…JEE Main 2004 (AIEEE)