# ETEC 420- applications of engineering technology

ETEC 420- applications of engineering technology

## module 8

Assignment 8:

True or false: In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.

2. True or false: A capacitor stores energy for ½ a cycle and gives it up on the other half, the net energy is zero.

3. True or false: A resistor dissipates power equal to the current squared times the resistance.

4. Utilizing your understanding of Electrical Quantities and Definitions. Consider a set of wires that are looped together in a circular coil of radius 2mm and a total flux density of 4T.

a. What is the associated current produced by the coil?
b. What is the resistance associated with this current through a 3m long copper 0.5m diameter copper wire?
c. What is the average power produced in Watts?

5. If an AC (R-C series) circuit discussed in the previous question had a 100-volt voltage source with the voltage phasor lagging 45ᴼ behind the current.

a) What is the current in ohms?

Discussion 8:

Discuss

• Choose a topic from Modules 6-8 that has been the most challenging for you.
• Give a thorough explanation of why you have found the topic challenging. Include an example problem and specify where in solving for the solution to the problem that it becomes challenging.

Guidelines

Reply to at least two other student posts with clear, step-by-step advice on how you approached the topic they are struggling with. No more than two responses are allowed per post so respond early.

You will not see posts from your peers until you first post your initial response.

Do not wait until the end of the week to contribute to each module’s discussions. Respond to the questions as early in the week as possible and then use the remainder of the week to read and reply to the posts of your classmates and all instructor comments directed toward your initial post