PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Three circuits—X, Y, and Z—each use identical batteries, identical resistors of resistance R, and identical capacitors of capacitance C.
• Circuit X: two resistors R connected in series, in series with one capacitor C
• Circuit Y: one resistor R in series with two capacitors C connected in series
• Circuit Z: two resistors R connected in parallel, in series with two capacitors C connected in parallel
Rank the circuits from the one with the shortest time constant (fastest charging) to the one with the longest time constant (slowest charging).
(a) Z<X<Y
(b) Y<Z<X
(c) X<Y<Z
(d) Z<Y<X