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Day 11 Inverters, Rectifiers, Semiconductors

Total questions: 24

Worksheet time: 15mins

Name
Class
Date
1.

Invertors convert:

a)
DC power to AC power
b)
AC power to DC power
c)
Mechanical energy to electrical energy
d)
Voltage to current
2.

What are the two types of aircraft inverters:

a)
Analog inverters and digital inverters
b)
Dynamic inverters and magnetic inverters
c)
Static inverters and rotary inverters
3.

Static inverter has replaced the rotary inverter in most applications because:

a)
Static inverters are more efficient, reliable, and require less maintenance.
b)
Static inverters are cheaper, less efficient, and require more maintenance.
c)
Rotary inverters are more reliable, efficient, and require less maintenance.
4.

Most semiconductors are made of:

a)

Oxygen, nitrogen,

b)

Silicon, germanium

c)

Lead, mercury,

d)

Aluminum, copper

5.

Adding a small amount of impurities to semiconductor material is known as:

a)
Purifying
b)
Refining
c)
Enhancing
d)
Doping
6.

This type of semiconductor doping creates a excess of electrons:

a)

N-Type

b)

P-type

7.

This type of semiconductor doping creates a "Hole" or deficiency of electrons:

a)

N-type

b)

P-type

8.

This type of diode allows current to flow in both forward and reverse directions when the voltage reaches a specific threshold.

a)
Zener diode
b)
Photodiode
c)
Schottky diode
d)
LED
9.

This schematic symbol represents:

a)

LED

b)

LCD

c)

Varactor

10.

This schematic symbol represents:

a)
Single-phase rectifier
b)

Half-wave rectifier and

c)

full-wave rectifier

11.

What are the three regions of the transistor:

a)
Base, Emitter, Gate
b)
Emitter, Collector, Gate
c)
Emitter, Base, Collector
12.

True or False: Capacitors are used as filters

a)
True
b)
False
13.

Inductors oppose change to____ while being used as a filter.

a)
current flow
b)
resistance flow
c)
voltage flow
d)
power flow
14.

Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of

a)

diode

b)

semiconductor

c)

conductor

d)

insulator

e)

superconductor

15.

In signal processing, a _________________ is a filter that passes most frequencies unaltered but attenuates those in a range to very low levels.

a)

band-pass filter

b)

band-stop or band rejection filter

c)

high-pass filter

16.

The _________________ is simply a variable-capacitance diode.

a)

capacadode

b)

LED

c)

varactor

17.

what is a diodes function

a)

allows current to flow in one direction

b)

allows current to flow in two directions

c)

is a resistor

18.

when a Diode is used as a half wave rectifier ....

a)

It rectifies only one half of the input AC signal

b)

It rectifies both the halves of the input AC signal

19.

What electrical component is used to smooth half wave current signals?

a)

Resistor

b)

Diode

c)

Capacitor

d)

Voltage regulator

20.

What is the unit of Electrical Power?

a)

Joule

b)

Watt

c)

Where

d)

Amp

21.
A _____________ limits the flow of electricity 
a)
resistor
b)
conductor
c)
circuit
22.

What is the unit of electric current?

a)

Volt

b)

Ampere

c)

Ohm

d)

Watt

23.

What is the main function of a diode in an electrical circuit?

a)

Amplify signals

b)

Regulate voltage

c)

Allow current flow in one direction only

24.
A voltmeter should be placed ........... in a circuit
a)
in parallel
b)
in series
c)
in order
d)
upside down