ECT122 Week 1

05/07/2014

Chapter 1Chapter 2 Chapter 3 Practice Problems *(Be sure to put the units in; volts, amps, etc.)

1.One coulomb of charge passes a point every 20 seconds. Calculate the value of the current through the point. I=Q/t = 1C/20s = .05C/s= .05 A x10^-3 C = 50mA

2.A total charge of 2.5 × 10-3 C passes a point every 40 seconds. Calculate the value of the current through the point. I=Q/t =0.0025C/40s= 6.25 C/s = 6.25 A

4.A total charge of 50 × 10-3 C passes a point every 2.5 seconds. Calculate the value of the current through the point. I= Q/t = 0.05C/2.5s = .02C/s = 0.2 Ax10^-3 = 20mA

6.Calculate the conductance of a 1.5 MΩ resistor.

G=IR= 1/1.5 MΩ = 6.66666667x10^6 s= 666.67 nS

7.Calculate the conductance of a 510 kΩ resistor.

G=I/R = 1/510 kΩ=.0019607843x10^3 s= 1.96us

23.Convert each of the following to engineering notation.

a.1.11 × 108 Hz= 11x10^6Hz

b.0.022 × 10-6 F 0022x10^-9 F = 0022nF = 22nF

24. a.0.00128 A (0.001,28)=1.28mA

b.0.000047 H (0.000,047)= 47uH

3.Determine the guaranteed range of values for a 360 kΩ resistor with a 5% tolerance.

342kΩ - 378kΩ

5.For each of the color codes listed, determine the rated value of the component.

Band 1

Band 2

Band 3

Value

a. Brown

Blue

Brown

_Gold _160k value- ranges 152Ω - 168Ω

c. Orange

White

Yellow

_Gold__ 390k Value- ranges370.5kΩ - 409.5kΩ

e. Yellow

Violet

Gold

__Gold 4.7k value__ranges- 4.465Ω - 4.935Ω_

7.Determine the colors of the first three bands for each of the following resistor values.

a.33 kΩ Orange, orange, orange, gold

c.910 kΩ White, brown, yellow, gold

f.10 MΩ Brown, black, blue, gold

h.0.24 Ω Red, yellow, silver, gold

10.For each of the color codes listed, determine the rated component value and the guaranteed range of measured values.

a.Yellow–Orange–Silver–Gold .43k Ω

b.Brown–Gray–Yellow–Gold –180 kΩ

c.Yellow–Violet–Orange–Silver- 470k Ω

d.Brown–Green–Silver–Gold .15k Ω

12.Convert the following numbers to engineering notation form without