Question : In figure, two positive charges, q2 and q3 fixed along the y axis, exert a net electric force in the +x direction on a charge q1 fixed along the x-axis. if a positive charge Q is added at (x,0), the force on q1
a) shall increase along the positive x-axis.
b) shall decrease along the positive x-axis.
c) shall point along the negative x-axis.
d) shall increase but the direction changes because of the intersection of Q with q2 and q3.
Doubt by Aanshika
Solution :
It is given that the force experienced by q1 due to two positive charges q2 and q3 is along the +ve x direction which confirms that the charge on q1 must be negative. Now, when another positive charge Q is placed on the positive x-axis then the charge q1 will be attracted more strongly towards it. Hence, the force on the charge q1 will increase along the positive x-axis.
Hence, a) would be the correct option.
