From law of conservation of energy
change in kinetic energy = change in potential energy
0.06 J =q*delta V
0.06 J =q*(vB - vA)
0.06 J =q*(333.0 V - 888.0 V )
q =(0.06 J)/(333.0 V - 888.0 V)
= -1.08108108*10^-4 C
= -108.108108 micro Coulomb
= -108 micro coulomb
magnitude q = 108 micro coulomb
sign : negative
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