The magnetic flux through a circuit of resistance `R` changes by an amount `Deltaphi` in a time `Deltat`. Then the total quantity of electric charge `Q` that passes any point in the circuit during the time `Deltat` is represent by
A. `Q = (Delta phi)/(Delta t)`
B. `Q = (Delta phi)/(Delta t) xx R`
C. `Q = -(Delta phi)/(Delta t)+R`
D. `Q = (Delta phi)/(R)`