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The magnetic flux through a circuit of resistance \( R \) changes by an amount \( \Delta \phi \) in a time \( \Delta t \). Then the
\( \mathrm{P} \)
total quantity of electric charge \( Q \) that passes
W
through any point in the circuit during the time \( \Delta t \) is represented by:
(1) \( Q=\frac{\Delta \phi}{R} \)
(2) \( Q=\frac{1}{R} \cdot \frac{\Delta \phi}{\Delta t} \)
(3) \( Q=R \frac{\Delta \phi}{\Delta t} \)
(4) \( Q=\frac{\Delta \phi}{\Delta t} \)
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