The magnetic flux through a circuit of resistance R changes by an amount ∆φ in a time ∆t. Then, the total quantity of electric charge Q that passes at any point in the circuit during the time ∆t is represented by
(a) ∆φ/R
(b) 1/R ∆φ/∆t
(c) R ∆φ/∆t
(d) ∆φ/∆t
