A charge of $4 C$ $4 C$ is passing through points A and B on a circuit. If the charge's electric potential changes from $45 J$ $45 J$ to $13 J$ $13 J$ , what is the voltage between points A and B?

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Answer 1 · 2017-07-29T05:09:42

The voltage between the points $A$ $A$ and $B$ $B$ is $= 8 V$ $=8V$

The charge is $Q = I t$ $Q=It$

We apply Ohm's Law

$U = R I$ $U=RI$

The power is

$P = U I$ $P=UI$

And the energy is

$E = U I t$ $E=UIt$

$E = U Q$ $E=UQ$

and

$DeltaE=QDeltaU$

The voltage is

$DeltaU=(DeltaE)/Q=(45-13)/4=32/4=8V$

A charge of 4 C4C4 C is passing through points A and B on a circuit. If the charge's electric potential changes from 45 J45J45 J to 13 J13J13 J, what is the voltage between points A and B?