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Electronics > Kevins Origin > Flashcards

Kevins Origin Flashcards

1
Q

What is a semiconductor?

A

An electric component that partially conducts electricity

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2
Q

What actually are voltage and current?

A

Voltage: the force that makes electrons flow
Current: the rate of the flow of electrons

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3
Q

What is the relationship between current and voltage due to Ohm’s law?

A

When current ↑ , voltage ↓
When current ↓ , voltage ↑

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4
Q

What is the unit for inductance?

A

Henries

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5
Q

What is inductance?

A

The property of an electric conductor that causes an electromotive force to be generated based on current direction

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6
Q

What is capacitance measured in?

A

Farads

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7
Q

What is capacitance?

A

The capability of something to store electric charge

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8
Q

What are 4 examples of semiconductors?

A

Diode
Transistor
LED
LDR

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9
Q

What are 5 examples of sensors?

A

LDR
Thermistor
Phototransistor
Moisture sensor
Piezo-electric crystals

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10
Q

What is the equation for Ohm’s law?

A

V = IR

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11
Q

What is the equation for power?

A

P = IV

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12
Q

What is the equation for total resistance in series and parallel ciruits?

A

Series: RT = R1 + R2 + R3
Parallel: 1/RT = 1/R1 + 1/R2 + 1/R3

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13
Q

What are the equations for the voltage divider rule?

A

V1 = V(R1/(R1 + R2))
V2 = V(R2/(R1 + R2))

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14
Q

What is the equation for charge relating to capacitance?

A

q = CV
charge = capacitance x voltage

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15
Q

What is the equation for total capacitance in series and parallel circuits?

A

Series: 1/CT = 1/C1 + 1/C2 + 1/C3
Parallel: CT = C1 + C2 + C3

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16
Q

What do electric filters do?

A

Allow passage of certain frequencies and blocks others

17
Q

What are the equations for the current divider rule?

A

I1 = I(R2/(R1 + R2))
I2 = I(R1/(R1 + R2))

18
Q

What is Kirchoff’s voltage law?

A

∑V = ∑IR
In a closed circuit the sum of the voltage drops must equal the dum of all the emf’s

19
Q

What is Kirchoff’s current law?

A

At a node the sum of currents floeing in must equal the sum of currents flowing out

Electronics (9 decks)

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