# Test Answers 2

## Lesson 6 – Question 1

Sorry, but that is incorrect. Solve for the two 20 ohm resistors in parallel first, and then the one in series.

## Lesson 6 – Question 1

Sorry, but that is incorrect. Solve for the two 20 ohm resistors in parallel first, then the one in series.

## Lesson 6 – Question 1

Good job! The 2 20 ohm resistors in parallel are equal to 10 ohms plus the 20 in series makes 30 ohms

## Lesson 6 – Question 2

Good Job! The three 30 ohm resistors in parallel equal 10 ohms plus the two 15 ohm resistors in series make it 40 ohms.

## Lesson 6 – Question 2

Sorry, but that is incorrect. Solve for the three resistors in parallel first, then add the series ones.

## Lesson 6 – Question 2

Sorry, but that is incorrect. Solve for the three resistors in parallel first, then add the series ones.

## Lesson 6 – Question 3

Sorry, You must have added them all up like they were in series. Solve the two 100 ohm resistors that are in parallel first, then add the one in series. Please try again.

## Lesson 6 – Question 3

Good Job! The two 100 ohm resistors in parallel equal 50 ohms and the 100 in series makes it 150 ohms.

## Lesson 6 – Question 3

Sorry, You must have treated them all like they were in parallel.

Solve the two 100 ohm resistors that are in parallel first, then add the one in series. Please try again.

## Lesson 7 – Question 1

Sorry, but that is incorrect.

## Lesson 7 – Question 1

Sorry, but that is incorrect. Please try again.

## Lesson 7 – Question 1

Good job! The ratio of resistance on a logarithmic potentiometer non linear. The center position is not equal to half the resistance. They are used in applications like volume controls because the ear doesn’t respond linearly to the increases in volume.

## Lesson 7 – Question 2

Good Job! A rheostat has two, a potentiometer has three, but sometimes only two are used.

## Lesson 7 – Question 2

Sorry, but that is incorrect. Please try again.

## Lesson 7 – Question 2

Sorry, Please try again.

## Lesson 7 – Question 3

Sorry, Please try again.

## Lesson 7 – Question 3

Good Job! A Thermistor whose resistance increases when the temperature increases is a Positive Temperature Coefficient Thermistor, sometimes abreviated PTC.

## Lesson 7 – Question 3

Sorry, Please try again.

## Lesson 8 – Question 1

Sorry, but that is incorrect.

## Lesson 8 – Question 1

Sorry, but that is incorrect. Please try again.

## Lesson 8 – Question 1

Good job! **A capacitor is made up of two plates, very close together, separated by an insulator called a** **dielectric**.

## Lesson 8 – Question 2

Good Job! **An Electrolytic Capacitor has plus and minus markings. It must be properly connected or it** **won’t work and could possibly explode!**

## Lesson 8 – Question 2

Sorry, but that is only half true. Please try again.

## Lesson 8 – Question 2

Sorry, That is only partially true. Please try again.

## Lesson 8 – Question 3

Sorry, Please try again.

## Lesson 8 – Question 3

Good Job! **Two 10 µfd capacitors are wired in parallel. The total value of that combination is** **20 µfd.**

## Lesson 8 – Question 3

Sorry, Remember, capacitors in parallel add up like resistors in series. Please try again.

## Lesson 9 – Question 1

Sorry, but that is incorrect.

## Lesson 9 – Question 1

Sorry, but that is incorrect. Please try again.

## Lesson 9 – Question 1

Good job! An inductor stores the energy electromagnetically.

## Lesson 9 – Question 2

Good Job! A 3mH inductor and a 2mH inductor in series would be the equivalent of a 5mH inductor.

## Lesson 9 – Question 2

Sorry, but that is incorrect. Series inductors add. Please try again.

## Lesson 9 – Question 2

Sorry, Series inductors add. Please try again.

## Lesson 9 – Question 3

Sorry, Please try again.

## Lesson 9 – Question 3

Good Job! Inductive Reactance is specified in ohms.

## Lesson 9 – Question 3

Sorry, Please try again.

## Lesson 10 – Question 1

Sorry, but that is incorrect. In some cases that might be true. A 1 to 1 transformer would be an isolation transformer used just to isolate the primary circuit from the secondary circuit while not changing the voltage or current. They are used a lot in telephone circuitry. Please try again.

## Lesson 10 – Question 1

Good job! For stepping up or down, different windings are used.

## Lesson 10 – Question 2

Good Job! Transformers work by changing current in one winding which induces changes in the other winding and therefore Alternating Current, or at least pulsed DC is needed.

## Lesson 10 – Question 2

Sorry, but that is incorrect. Transformers work by changing current in one winding which induces changes in the other winding and therefore Alternating Current, or at least pulsed DC is needed. Please try again.

## Lesson 10 – Question 2

Sorry, but that is incorrect. Transformers work by changing current in one winding which induces changes in the other winding and therefore Alternating Current, or at least pulsed DC is needed. Please try again.

## Lesson 10 – Question 3

Sorry, incorrect.

## Lesson 10 – Question 3

Good Job! **Iron core transformers are used for lower** **frequencies**.

## Lesson 10 – Question 3

Sorry, Please try again.