## Questions 88-90
In the circuit above, the resistors all have the same resistance. The battery, wires, and ammeter have negligible resistance. A closed switch also has negligible resistance.
88. Closing which of the switches will produce the greatest power dissipation in R2 ?
(A) S1 only
(B) S2 only
(C) S1 and S2 only
(D) S1 and S3 only