Question

If charged particle of mass 2mg hangs in air in electric field of 4n/c directed upward. Calculate the charge and determined its nature.

Answer 1

Answer:

mg/2

Explanation:

balance forces since mass is at rest . AS THE PARTICLE IS AT REST AND W=DOWNWARD electric force MUST BE UPWARD Ii.e in the direction of electric field ;so , charge must be +ve Since F=Q(E)  (IF F must be in the direction of E, THEN , Q=+q)

so,weight=electric force(F =E(Q) =4(q)

i.e 2mg=4q

q=+mg/2