Question 485: Electrostats & Capacitance

Question

Two particles A and B having charges 20$$\mu$$C and $$-$$5$$\mu$$C respectively are held fixed with a separation of 5 cm. At what position a third charged particle should be placed so that it does not experience a net electric force?

Accepted Answer

Null point is possible only right side of $$-$$5 $$\mu$$C
$${E_N} =  + {{k( - 5\mu C)} \over {{x^2}}} + {{k(20\mu C)} \over {{{(5 + x)}^2}}} = 0$$
x = 5 cm
$$	herefore$$ Option (b) is correct.

Answer

At 5 cm from 20 $$\mu$$C on the left side of system

Answer

At 5 cm from $$-$$5 $$\mu$$C on the right side

Answer

At 1.25 cm from $$-$$5 $$\mu$$C between two charges

Answer

At midpoint between two charges

Electrostats & Capacitance

Two particles A and B having charges 20$\muC and -5\mu$C respectively are held fixed with a separation of 5 cm. At what position a third charged particle should be placed so that it does not experience a net electric force?

Choose the correct answer: