Math Problem Statement

1. Given the AC signal below, determine: a. The frequency and the peak-to-peak voltage for signal A. b. Is signal A leading or lagging signal B? 2. Determine the total capacitance for both circuits. 3. Determine the capacitor voltage after 1.5 ms of closing the switch. Assume capacitor is fully discharged just before closing the switch.

Solution

Let's go through each question step-by-step to solve the problems presented in your quiz.

Question 1:

Given the AC signal graph, we need to determine:

a. The frequency and the peak-to-peak voltage for signal A.

From the graph:

  • The time period TT can be found by looking at the duration between two consecutive peaks or two zero-crossings in the same direction.
  • From the graph, it appears that the period TT is approximately 2 milliseconds (ms).

Using the formula: f=1Tf = \frac{1}{T} where T=2ms=0.002sT = 2 \, \text{ms} = 0.002 \, \text{s}, we get: f=10.002=500Hzf = \frac{1}{0.002} = 500 \, \text{Hz}

To determine the peak-to-peak voltage:

  • The graph shows the signal amplitude varying from 00 to approximately 1010 V, meaning the peak-to-peak voltage is 10V10 \, \text{V}.

Answer for 1(a):

  • Frequency: 500 Hz
  • Peak-to-peak Voltage: 10 V

b. Is signal A leading or lagging signal B?

From the graph, signal A reaches a peak before signal B. This indicates that signal A is leading signal B.

Answer for 1(b):

  • Signal A is leading signal B.

Question 2:

Determine the total capacitance for both circuits.

For capacitors:

  1. In series: The total capacitance CtotalC_{total} is given by: 1Ctotal=1C1+1C2\frac{1}{C_{total}} = \frac{1}{C_1} + \frac{1}{C_2}

  2. In parallel: The total capacitance CtotalC_{total} is given by: Ctotal=C1+C2C_{total} = C_1 + C_2

Left Circuit:

  • Capacitance in series: (

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Math Problem Analysis

Mathematical Concepts

AC Circuits
Capacitance
RC Circuits
Exponential Growth and Decay

Formulas

Frequency: f = 1 / T
Total Capacitance in Series: 1 / C_total = 1 / C1 + 1 / C2
Total Capacitance in Parallel: C_total = C1 + C2
Voltage across Capacitor in RC Circuit: V(t) = V0(1 - e^(-t/RC))

Theorems

Capacitance in Series and Parallel Circuits
Exponential Charging of Capacitors in RC Circuits

Suitable Grade Level

Grades 10-12