More Electronics BS

Question 1

What do generators do? What do motors do?

Answer 1

Generators: turn mehcanical movement into electrical signals
Motors: turn electrical signals to mechanical movement

Question 2

What does a conductors moving in a magnetic field do?

Answer 2

Generate a current

Question 3

What do transformers do?

Answer 3

Changes voltages from low to high or high to low

Question 4

What is the difference between Fleming’s left and right hand rule?

Answer 4

Left = current
Right = induced current

Question 5

What do the thumb, index finger and middle finger represent with Fleming’s left and right hand rules?

Answer 5

Thumb = thrust of motion
Index = field
Middle = current

Question 6

What is frequency?

Answer 6

The number of cycles per second

Question 7

What is a period (T) of a wave? What is the equation for this?

Answer 7

Time required to complete one cycle
T = 1 / f

Question 8

What is the symbol for rotational frequency? What is its equation?

Answer 8

ω
ω = 2 x π x f

Question 9

What is the phase of a wave?

Answer 9

Phase (Φ) is where the wave is in its cycle

Question 10

What are the equations summing up Kirchoff’s current and voltage laws?

Answer 10

Current: ∑I = 0
Voltage: ∑E = ∑V

Question 11

What do semiconductors do?

Answer 11

Partially conduct electricity

Question 12

In what direction do diodes pass current? What about Zener diodes?

Answer 12

Diodes = 1 direction
Zener = Both directions, especially reverse

Question 13

What is the difference between NPN and PNP resistors?

Answer 13

NPN = current flows away from emitter
PNP = current flows towards emitter

Question 14

What type of junction does a diode have?

Answer 14

PN junction

Question 15

In what direction do single PN junctions and diode bridges conduct in?

Answer 15

Single PN junctions: 1 direction
Diode brudges: both directions