7.8 The graph shows the voltage across and the current through a single circuit element connected to an ac generator. a. Determine the frequency of the generator. Ans.: 12.5 Hz b. Determine the rms voltage across this element. Ans.: 70.004 V c. Determine the rms current through this element Ans.: 1.98 A d. Identify the circuit element. Explain your reasoning.
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- From the graph, observe the time period \( T \) of the voltage or current waveform. The time period is the duration of one complete cycle. - The graph shows that one complete cycle takes 0.08 seconds. - Use the formula for frequency: \( f = \frac{1}{T} \). - Show more…
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Part A The following graph shows the voltage and current through a single circuit element. What is the frequency of the ac generator? Vp = 86.0 V, Ip = 3.10 A, t1 = 0.0565 s. Part B What is the average power dissipated in this element? Part C The circuit element above is either a resistor, an inductor, or a capacitor. Use the graph and what you know of circuit elements to determine what type of element is shown in the graph. If it is a resistor, what is the value of its resistance? If it is an inductor, what is its inductance? If it is a capacitor, what is its capacitance?
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An ac voltmeter, which displays the rms voltage between the two points touched by its leads, is used to measure voltages in the circuit shown in FIGURE 24-36. In this circuit, the ac generator has an rms voltage of 9.00 V and a frequency of 25.0 kHz. The inductance in the circuit is 0.250 $\mathrm{mH}$ , the capacitance is 0.150$\mu \mathrm{F}$ , and the resistance is 2.50$\Omega .$ What is the reading on a voltmeter when it is connected to points (a) A and B, (b) B and C, (c) A and C, and (d) A and D?
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