3.3

Question 1

What is the SI prefix, decimal factor and power of the Symbol G?

Answer 1

Giga, 1 billion, 10^9

Question 2

What is the SI prefix, decimal factor and power of the Symbol M?

Answer 2

Mega, 1 million, 10^6

Question 3

What is the SI prefix, decimal factor and power of the Symbol K?

Answer 3

Kilo, 1000, 10^3

Question 4

What is the SI prefix, decimal factor and power of the Symbol m?

Answer 4

Milli, 0.001, 10^-3

Question 5

What is the SI prefix, decimal factor and power of the Symbol µ?

Answer 5

Micro,0.000001,10^-6

Question 6

What is the SI prefix, decimal factor and power of the Symbol n?

Answer 6

Nano, 0.000000001, 10^-9

Question 7

What is voltage?

Answer 7

Voltage is a measure of the difference in electrical charge between two points

Question 8

What is the SI unit for Voltage, Electromotive field (EMF) and Potential difference (PD)?

Answer 8

Volt (V)

Question 9

All voltages are classified as either a Potential Difference (PD) or an Electromotive Force (EMF), true or false?

Answer 9

True

Question 10

What are the two kinds electric voltage?

Answer 10

Direct current and Alternating current

Question 11

What is DC voltage?

Answer 11

Maintains the same polarity even if values change

Question 12

What is AC voltage

Answer 12

a voltage’s magnitude and polarity change over time

Question 13

Is a EMF a voltage or a force?

Answer 13

Voltage

Question 14

How is EMF maintained across poles?

Answer 14

can be done mechanically in a generator, which transfers kinetic energy stored in a turbine to electrical energy in the circuit; or, alternatively, by a galvanic cell that transfers chemical energy in the cell to electrical energy in the circuit.

Question 15

Does potential difference also apply when there is no current flowing?

Answer 15

Yes

Question 16

How is Potential difference measured?

Answer 16

It is measured across a component or between two named points

Question 17

What causes a potential difference?

Answer 17

Caused by a deficiency of electrons at one point and an excess of electrons at another

Question 18

What happens if a voltmeter has an inadequate measuring range for measuring the voltage?

Answer 18

May become overloaded or damaged

Question 19

What are two different ways to indicate measured voltage?

Answer 19

Pointer deflection
Numerical read out

Question 20

What type of metre is a pointer deflection metre?

Answer 20

Analogue

Question 21

What type of metre is a numerical read out metre?

Answer 21

Digital

Question 22

What is the typical aircraft AC power?

Answer 22

115V

Question 23

What is the typical aircraft DC power?

Answer 23

28V

Question 24

What unit is used to measure Current?

Answer 24

Ampere

Question 25

What is the SI symbol for current (Ampere)

Answer 25

I

Question 26

What does the rate of current flow depend on?

Answer 26

EMF of the supply and the resistance of the circuit

Question 27

The higher the EMF the higher the....

Answer 27

current

Question 28

What are the possible types of movement in solid conductive bodies?

Answer 28

Electron currents

Question 29

What are the possible types of movement in conductive liquids?

Answer 29

Ion currents

Question 30

What are the possible types of movement in conductive gases ?

Answer 30

Electron and Ion currents

Question 31

What are the possible types of movement in a vacuum?

Answer 31

Electron and Ion currents

Question 32

What are the 4 factors that change the speed of movement of charges?

Answer 32

Conductor material Conductor cross section Potential difference Temperature

Question 33

1 coulomb of charge is carried by...

Answer 33

6.24 x 10^18 electrons

Question 34

The proper polarity must be chosen for DC and AC ammeters, the positive connection to the positive pole, and the negative connection to the negative pole. True or false?

Answer 34

False, The proper polarity must be chosen for DC ammeters, the positive connection to the positive pole, and the negative connection to the negative pole. In AC ammeters this is not necessary.

Question 35

What is the units for Resistance?

Answer 35

Ohms

Question 36

How is resistance calculated?

Answer 36

R=V/I

Question 37

What effect does cross sectional area have on the resistance?

Answer 37

The smaller the cross sectional area the higher the resistance and vice versa

Question 38

High resistance means what level of conductance?

Answer 38

Low conductance

Question 39

Low resistance means what level of conductance?

Answer 39

High conductance

Question 40

How do you measure conductance?

Answer 40

G=1/R

Question 41

What is conductance measured in?

Answer 41

Siemens