PHY132H1 Midterm: PHY132H1 - Term Test 2
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Mag(cid:374)etis(cid:373) a(cid:374)d the ea(cid:396)th"s mag(cid:374)eti(cid:272) field 31. Solenoids, atomic magnets, and electron spins 47. If 2 objects are in a circuit such that both ends of the object are connected, they are said to be in parallel. The current splits and travels through r1 and r2 separately. Voltage drop across resistors must be the same as that of the battery. V1 = v2 = veq = v. What is the total current drawn from this battery: 1 a, 2 a, 3 a. R(cid:1005) (cid:1005) (cid:1006)(cid:1004) (cid:1005) (cid:1005)(cid:1004) (cid:2869)req = (cid:2869)req = (cid:2869)req = (cid:1004). (cid:1005)(cid:1009) -1. Bottom resistor: i = vr = (cid:1006)(cid:1004)v (cid:1005)(cid:1004) . Note: it makes sense that req is less than either resistor because there are 2 paths available for current flow when resistors are hooked up in parallel. The power dissipated by a resistor is pr = The power supplied by a battery is p(cid:271)at=i power delivered by an emf.
