Flag Electrostatics> a charge q is projected from a large dist...
question mark

a charge q is projected from a large distance with speed v towards a fixed charged particle Q. It approaches Q upto a distance r and then returns. If closest is r/2, then projected velocity should be

Sahil Gupta , 8 Years ago
Grade 12
anser 1 Answers
Vikas TU

Last Activity: 8 Years ago

At large distance that is the distance approaching to infinity the potential energy assumes to be zero.
Therefore, the energy theorem proves here to be:
0.5mv^2 + 0 = KQq/r.................(1)
for closest distance r/2,
0.5mv0^2 = KQq/(r/2) => 2KQq/r...................(2)
Dividing bot the eqns. we get,
(v/v0)^2 = ½
v/v0 = 1/root(2)
v0 = v*root(2) m/s
 

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...