Understanding Motor Controls
Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 54, Problem 8RQ

Refer to Figure 54–8. If resistor R1 is 200 ohms and resistor R2 is 10 kilohms, what is the gain of the amplifier?

Chapter 54, Problem 8RQ, Refer to Figure 548. If resistor R1 is 200 ohms and resistor R2 is 10 kilohms, what is the gain of

Figure 54–8 Noninverting amplifier connection.

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4. A circuit contains a 20-2 resistor and an inductor with an inductance of 0.093 H. If the circuit has a frequency of 60 Hz, what is the total impedance of the circuit? 5. An R-L series circuit has a power factor of 86%. By how many degrees are the voltage and current out of phase with each other? 6. An R-L series circuit has an apparent power of 230 VA and a true power of 180 W. What is the reactive power? 7. The resistor in an R-L series circuit has a voltage drop of 53 V, and the inductor has a voltage drop of 28 V. What is the applied voltage of the circuit?
Refer to the figure below and calculate the current (in Amps) through the R2 resistor.
If the impedance Z1 = 10 +j10 and the impedance Z2 = 10 - j0 are connected in series, the equivalent impedance would be: O A. 20-j10 ohms O B. 20+ j20 ohms O C. None of the other choices are correct O D. 20 ohms O E. 20+ j 10 ohms
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