Скачать или смотреть Intro Circuit Analysis EXAM 1 | Ch.1-3: Circuit Variables & Elements & Simple Resistive Circuits

Playlist:    • Introductory Circuit Analysis  

Notes:
https://docs.google.com/document/d/1i...


00:00 Intro

00:21 Question 1
A 12 V battery supplies 130 mA (milli A) to a portable music system.
a) Determine the power delivered/absorbed by the music system
b) Determine how much energy the battery delivers/absorbs in 5 minutes?

02:43 Question 2
The voltage and current at the terminals of this circuit are zero for t { 0.
For t ≥ 0 v = 40 e-1,800t Volts i = 7 e-1,800t Amps
a) Find the power absorbed/delivered by the circuit element at t = 500 µs (micro seconds).
b) How much energy is absorbed/delivered by the circuit element between zero and 500 µs (micro seconds)?

05:17 Question 3
Given:
A student measured the voltage and current for the resistor as shown in the figure.
v = -9.37 Volts i = 0.56 Amps
The instructor verified that the voltage was measured correctly.
a) Was the current measured correctly?
b) Find the power absorbed/delivered by the resistor. If needed, correct any measuring mistake (sign not magnitude). “+” = absorbed and “-” = delivered

06:48 Question 4
Calculate the power in each circuit element.
“+” = absorbed and “-” = delivered

08:26 Question 5, 6
Given:
R1 = 145 Ω (Ohm) R2 = 485 Ω (Ohm) R3 = 4839 Ω (Ohm)
Find the equivalent resistance REq.
REq = ??? Ω (Ohm)

-Question 6-
Given:
R1 = 226 Ω (Ohm) R2 = 239 Ω (Ohm) R3 = 2484 Ω (Ohm)
Find the equivalent resistance REq.
REq = ?? Ω (Ohm)

10:14 Question 7
Given the voltage source (far left side) is producing 30 Volts.
Find the current i1 through the 30 Ω resistor.