Question

An a-particle is projected with a kinetic energy of
18 eV from infinity towards a fixed point charge
20 pC. The distance of closest approach of the
a-particle, from the fixed point charge, is
(1) 2 cm
(2) 4 cm
(3) 6 cm
(4) 9 cm​

Answer 1

$hello \: mate \:$

$the \: correct \: answer \: is \: 6 \: cm \:$

❤

Answer 2

six cm is correct.......