Test 1

Question 1

What is a AC wave developed by

Answer 1

AC generator

Question 2

RMS value of a wave form is the?

Answer 2

Effective heating value of the AC wave

Question 3

Is measuring the average voltage cheaper then measuring RMS voltage T or F

Answer 3

True

Question 4

When the diode is more the 0.7V, what position is the diode

Answer 4

Forward bias

Question 5

In a positive half cycle what diodes are being used

Answer 5

D1 and D2

Question 6

In a negative half cycle what diodes are being used

Answer 6

D3 and D4 (forward bias)

Question 7

Capacitor filtering- what happens to the CR3 diode during a positive half cycle

Answer 7

CR3 turns on and allows C3 to charge (charge time is very short)

Question 8

Capacitor filtering- what happens to the CR3 diode during negative half cycle when voltage goes negative

Answer 8

CR3 turns off, because it turns to reversed bias and only the RL can only discharge (slower rate then charging)

Question 9

What happens to the ripple if current goes up

Answer 9

Ripple goes up

Question 10

When there’s a bigger capacitor, does the ripple get bigger or smaller?

Answer 10

Smaller

Question 11

What does filtering capacitors help with?

Answer 11

1. Smoother output waves
2. Increase the peak current load

Question 12

Since the capacitor charges in a short period, what must the diodes be able to do?

Answer 12

Must be able to handle a considerable amount of peak current

Question 13

Does RC filter better the LC

Answer 13

No

Question 14

How much volt can a zener hold up to

Answer 14

10volts

Question 15

Zener diodes maintains?

Answer 15

1. Fixed Voltage drop
2. Load
   3 precise voltage across terminals when reversed bias

Question 16

What happens when a zener is on its own

Answer 16

1.Can only handle small currents
2.Limited to a small fixed power supply

Question 17

Linear regulators control voltage by?

Answer 17

1.Adjusting current flow
2. Using Zener as a reference

Question 18

Switching regulators control voltage by ?

Answer 18

1. The length of time switching device is turned on
2. Using a Zener as reference

Question 19

Advantages of a full wave bridge rectifier

Answer 19

1.Doesn’t require a CT transformer
2. More compacted and cost effective

Question 20

How does inductive filtering work

Answer 20

Uses inductor to filter out the AC ripple by resisting changes in current flow