Figure 3 8. What is the effective current in the circuit shown in Fig. 3? +10 A

Question

Figure 3 8. What is the effective current in the circuit shown in Fig. 3? +10 A 0.01 s 003 s 0.005 s 0.02 s -10 A 9. A series circuit has a resistance of 40 ?, an inductive reactance of 30 ?, and a capacitive reactance of 50 ? when connected to a certain ac source. Find the impedance of the circuit 10. A 10-ALF capacitor, a 0.10-H inductor, and a 60-? resistor are connected in series across a 120-V, 60-Hz power line. Find (a) the current in the circuit, (b) the power dissipated in it, and (c) the potential difference across each of the circuit ele- ments 11. In the antenna circuit of a radio receiver that is tuned to a certain station, R-5.0 ?, L-5.0 mil, and C-5.0 pR Find the frequency of the station.

Explanation / Answer

9.

R = resistance = 40 ohm

XL = inductive reactance = 30 ohm

Xc = Capacitive reactance = 50 ohm

impedence is given as

z = sqrt(R2 + (XL - Xc)2)

z = sqrt(402 + (30 - 50)2)

z = 44.72 ohm

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