Question

A test charge is introduced into the electric field of a charge. It feels a force of 2 F where the electric field is 4 E. What would the force on the test charge be where the electric field is 1 E?

Answer 1

We know, q = F / E
q = 2 / 4
q = 1/2

Now, we have: q = 1/2 and E = 1
Substitute the value into the expression:
F = E.q
F = 1/2 * 1 = 1/2

In short, Your Answer would be 1/2

Hope this helps!