A charge of #9 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #9 J# to #3 J#, what is the voltage between points A and B?

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Answer 1 · 2016-04-12T06:20:30

#V_"AB"=-2/3 V#

#"data:"#
#q=9C#
#E_A=9J" potential energy for the point of A"#
#E_B=3J" potential energy for the point of B"#

#W=Delta E=E_B-E_A" work doing between two point"#

#W=3-9=-6J#

#W=q(V_B-V_A)#

#V_"AB"=V_B-V_A#

#W=q*V_"AB"#

#-6=9*V_"AB"#

#V_"AB"=-2/3 V#