Question

A particle of mass m and charge q is at rest.on applying an uniform electric field on it,it starts moving.what is its kinetic energy if it moves a distance y​

Answer 1

Answer:

qEy

Explanation:

Explanation:

Mass of the particle = m (Given)

Charge of the particle = q (Given)

Uniform electric field = E (Given)

According to the third equation of motion -

v² - u² = 2as

Where u = 0 as the particle is initially at rest and  s = y the displacement

Thus,

v² = 2ay ---- 1

Force on a particle in electric field is defined as - F = qE

Since, F = ma thus,

a = qE/m ---- 2

Substituting the value in first equation -

v² = 2. qEy/ m ----- 3

Kinetic energy = 1/2mv²

Substituting the value in third equation -

K = qEy

Read more on Brainly.in - https://brainly.in/question/11770824#readmore

Hope this helps! Feel free to mark it brainliest if it does! Thanks :D