CHAPTER 1 DC REVIEW AND PRETEST12QUESTIONSWhat is the total or equivalent resistance? A. R1 5 1 ohm, R2 5 1 ohm RT 5 B. R1 5 1,000 ohms, R2 5 500 ohms RT 5 C. R1 5 3,600 ohms, R2 5 1,800 ohms RT 5 ANSWERA. 0.5 ohmsB. 333 ohmsC. 1,200 ohmsRT is always smaller than the smallest of the resistors in parallel.POWER 13 When current ﬂows through a resistor, it dissipates power, usually in the form of heat. Power is expressed in terms of watts.QUESTIONWhat is the formula for power? ANSWERThere are three formulas for calculating power: PVI or PI R or PVR22Book Author c01 V1 07/04/2012 2:42 PM c01.indd 127/4/2012 2:44:25 PM