College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- a. A 1 GHz frequency is used. In an air dielectric transmission line, what is the number of centimeters in a wavelength? In a half wave- length? A quarter wavelength? b. If the load causes a VSWR of 3.0 and a minimum voltage point 0.1 wavelengths from the load, what is the normalized load impedance and the actual load impedance, assuming Zo equals 50 ohms?arrow_forwardI do not understand the equations for the two loop equations. If it asks for 0=____ and I input 10V-I1R1+I3R3 it does not accept itarrow_forwardThe current amplitude in a pure inductor in a radio receiver is to be 250 µA when the voltage amplitude is 3.60 V at a frequency of 1.60 MHz. What inductive reactance is needed? What inductance? 1.44 k2, 0.143 mH 144 kQ, 14.3 mH 14.4 kQ, 1.43 mH 14.4 kQ, 14.3 mHarrow_forward
- We are building a radio receiver that is designed to have a low impedance at a specific frequency 1.4 Megahertz (or omega = 8796459.43005 radians/second). We have nanoFarad (10^{-9} F) capacitors and 10 nanoFarad (10^{-8} F) capacitors available. We will choose a capacitor and an inductor and place them in series to make (this part of) the circuit. What size inductor should we use if we choose the nanoFarad capacitor? What size inductor should we use if we choose the 10 nanoFarad capacitor? H H The circuit operates at resonance for both these choices, so we need to use another criterion to determine which LC combination to use. Let's use the total (L + C) reactance at other frequencies (we want this reactance to be high at frequencies away from the frequency we have tuned to). If we move 10% higher in frequency (omega = 9676105.37306), what is the reactance for the LC combination with the nanoFarad capacitor? Ohms and what is the reactance for the LC combination with the 10 nanoFarad…arrow_forwardThe charge q on the capacitor in a simple RLC circuit is governed by the oquation Lq"(t) + Rq'(1) +cat) - E), where L is 02 herys 5 farnde the inductance, R the resistance, C the capacitance, and E the voltage source. Since the resistance of a resistor incroases with temperature, assume that the resistor is heatod so that the resistanco at time t is R(1) = 7+t2. IL=0.2 H, C=5 F, E)=0, q(0) =4 C, and q'(0) = 0 A, find the first four nonzero terms in a power series expansion about t=0 for the charge on the capacitor. 9(0)-4 coulombs R)-7+t oluns gr0)-0 amps (Type an exprossion that includes all terms up to ordor 4.)arrow_forwardConsider the RL circuit in the figure with R=10.00 Ω, L1=1.80 H, L2=3.90 H, and V=5.0 V. At time t=0, the switch is closed to connect the circuit to a constant emf. How long (in seconds) does it take for the current to reach a value of Imax/2.71828 of its maximum value, where Imax is the maximum current through the circuit?arrow_forward
- The capacitance of biological membranes is about 1.0 μF per cm2 of membrane area, so investigators can determine the surface area of a cell membrane by using intracellular electrodes to measure the membrane’s capacitive reactance. An investigator applies a 1.0 μA peak current at 40 kHz to a cell and measures the peak out-of-phase voltage—that is, the component of the voltage due to the capacitive reactance of the cell membrane—to be 0.16 V. If the capacitance of a cell membrane is measured to be 6.0 x 10-11 F, what is the area?A. 6.0 x 10-13 m2B. 6.0 x 10-11 m2C. 6.0 x 10-9 m2D. 6.0 x 10-7 m2arrow_forwardAn inductor has a peak current of 330 A when the peak potential is 2.2V at 45 MHz.What is the inductance?arrow_forwardThe current amplitude in a pure inductor in a radio receiver is to be 250 μA when the voltage amplitude is 3.60 V at a frequency of 1.60 MHz. What inductive reactance is needed? What inductance? 14.4 kQ, 1.43 mH 14.4 kQ, 14.3 mH 144 kQ, 14.3 mH 1.44 kQ2, 0.143 mHarrow_forward
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