Question

A 2 - gram object, located in a region of uniform electric field E = (300 NC) i charge O. The object released from rest at x = 0, has a kinetic energy of 0.12 Jatx=05 Then Qis (D)- 800 uc (A) 400 uc () (B) - 400 uc (C) 800 uc​

Answer 1

Answer:

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Explanation:

Correct option is

C

(4.5i^+6j^)m/s2

ATQ,  Electric field, E=(3i+4j)N/c

                           mass =2mg=2×10−6kg

                        charge =3×10−6c

F=qE=(3i+4j){3×10−6}N

Also, from Newton's law, F=ma

or  a=mF=2×10−6(3i+4j)(3×10−6){m/s2}

                    =(4.5i+6j)m/s2

∴  Option (C) is the correct answer.