* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Session 25 Answers - Iowa State University
Superheterodyne receiver wikipedia , lookup
Crystal radio wikipedia , lookup
Audio power wikipedia , lookup
Schmitt trigger wikipedia , lookup
Wien bridge oscillator wikipedia , lookup
Josephson voltage standard wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Regenerative circuit wikipedia , lookup
Standing wave ratio wikipedia , lookup
Operational amplifier wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Opto-isolator wikipedia , lookup
Valve audio amplifier technical specification wikipedia , lookup
Index of electronics articles wikipedia , lookup
Current mirror wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Power MOSFET wikipedia , lookup
Radio transmitter design wikipedia , lookup
Surge protector wikipedia , lookup
Power electronics wikipedia , lookup
Electrical ballast wikipedia , lookup
Current source wikipedia , lookup
Valve RF amplifier wikipedia , lookup
RLC circuit wikipedia , lookup
Leader: Garrett Schieber Course: Phys 222 Instructor: Dr. Al-Saqer Supplemental Instruction Date: 10/27/14 Iowa State University 1) The voltage across the terminals of an ac power supply varies with time according to . The voltage amplitude is V0 = 46.0 V. (Book 31.3) a) What is the root-mean-square potential difference Vrms? Session 25: RLC Circuits and Power b) What is the average potential difference Vave between the two terminals of the power supply? 2) In a series L-R-C circuit, the components have the following values: L= 20.0 mH, C= 140nF, and R= 350 Ω. The generator has an rms voltage of 120 V and a frequency of 1.25 kHz. (Book 31.26) a) Determine the average power supplied by the generator b) Determine the average power dissipated in the resistor 3) An ac source whose rms voltage is 80 V is in series with a 100- ohm resistor and a capacitor, whose reactance is 200 ohms at the frequency of the source. The instantaneous current, when the voltage of the source is zero and is increasing, is closest to: a) Zero b) 0.23 A c) 0.16 A d) 0.45 A e) 0.32 A Supplemental Instruction 1060 Hixson-Lied Student Success Center 294-6624 www.si.iastate.edu 4) An R-L-C series circuit is constructed using a 175-ohm resistor, a 12.5-µF capacitor, and an 8.00-mH inductor, all connected across an ac source having a variable frequency and a voltage amplitude of 25.0 V. a) At what angular frequency will the impedance be smallest? b) What is the impedance at this frequency? c) At the angular frequency in part A, what is the maximum current through the inductor? d) At the angular frequency in part A, find the potential difference across the ac source, the resistor, the capacitor, and the inductor at the instant that the current is equal to one-half its greatest positive value. 5) A transformer connected to a 120-V(rms) ac line is to supply 13000 V(rms) for a neon sign. To reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 mA. (Book 31.38) a) What is the ratio of secondary to primary turns of the transformer? b) What power must be supplied to the transformer when the rms secondary current is 8.50 mA? c) What current rating should the fuse in the primary circuit have?