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AGK Electrics > Intro (23-07-18) > Flashcards

Intro (23-07-18) Flashcards

1
Q

Which direction is conventional flow?

A

+ve to -ve

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2
Q

Which direction is electron flow?

A

-ve to +ve

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3
Q

What is the power equation?

A

P = I x V

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4
Q

what is ohms law?

A

V = I x R

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5
Q

What kind of voltages are used on light A/C?

A

14V DC

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6
Q

What kind of voltages are used on large A/C?

A

28V DC for small controllable loads

115V AC for larger loads

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7
Q

What is current?

A

electron flow

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8
Q

What is voltage?

A

electrical pressure

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9
Q

What is resistance?

A

resistance to current (DC circuits only)

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10
Q

What is impedance?

A

AC circuit resistance

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11
Q

What is inductance?

A

generation of electron flow

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12
Q

What is reactance?

A

resultant effect of inductance or capacitance

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13
Q

What is capacitance?

A

ability to store charge

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14
Q

What are 6 ways to provide EMF to move electrons?

A

friction - static electricity

chemical action - cells and batteries

magnetism - generators and alternators

heat - thermocouples

light - photo electric cell

pressure - piezo electric crystals

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15
Q
A
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16
Q

What is the equation for the force created by a current flowing through a length of wire in between the poles of a magnet?

A

F = B x L x I

B - flux density

L - length of wire in meg field

I - current

17
Q

What is the unit used to measure capacitance?

A

farad

usually in the magnitude of millifarad

18
Q

How do you calculate the overall resistance of resistors in series?

A

add them together

19
Q

How do you calculate the overall resistance of resistors in parallel?

A

1/Rt = 1/R1 + 1/R2 + etc

20
Q

What 3 factors determine the capacitance of a capacitor?

A

area of plates

distance between plates

dielectric constant of dielectric

21
Q

What is the equation for calculating the capacitance of a capacitor?

A

c = q / v

q - charge

v - voltage

AGK Electrics (1 decks)

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