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Technology GCSE.Year11 > Electronics > Flashcards

Electronics Flashcards

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1
Q

What is the symbol for Current and the unit

A

I
Amps(A)

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2
Q

What is the symbol for Volatage and the unit

A

V
Volts

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3
Q

What is the symbol for Resistance and the unit

A

R
Ohms (Ω)

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4
Q

What is the formula for ohms Law?

A

I = V/R

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5
Q

What does PCB stand for?

A

Printed Circuit Board

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6
Q

What type of metal is used on a PCB?

A

Copper (Cu)

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7
Q

What is the name of a circuit practice testing board?

A

Bread Board

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8
Q

How do you calculate the total resistance from 2 resistors?

A

RTotal = R1 + R2

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9
Q

What does the gold tolerance band mean?

A

Gold Band = +/- 5%

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10
Q

What does the silver tolerance band mean?

A

Silver Band = -/+10

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11
Q

If you want the circuit to react with more temperature/light where would you put the thermistor/LDR

A

Top

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12
Q

If you want the circuit to react with less temperature/light where would you put the thermistor/LDR

A

Bottom

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13
Q

What is a Resistor also known as?

A

Fixed Resisitor

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14
Q

What is special about the Variable Resistor?

A

They can have their resistance changed by turning the controller.

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15
Q

What does LDR stand for?

A

Light Depending Resisitor

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16
Q

What decides on the strength of the resistance in a LDR?

A

Strength of Light

17
Q

What decides on the strength of the resistance in a Thermistor?

A

The temperature

18
Q

What is the formula for a voltage divider

A

. R Bottom
V out = ————————— X V in
R Bottom + R Top

19
Q

What are with the 3 legs of a transistor?

A

. Collector

Base

. Emitter

20
Q

What are the 3 legs of a thyristor?

A

. ㅤ Anode

ㅤ

Gate
ㅤ Cathode

21
Q

What special rule does a transistor follow?

A

While under 0.7V electricity gets directed away from the output device through the emitter leg.
While at 0.7V or above the electricity is directed towards the output device via the collector leg.
When electricity drops back to under 0.7V the transistor automatically redirects the power to the emitter.

22
Q

What special rule does a thyristor follow?

A

While under 0.7V electricity gets directed away from the output device via the cathode leg.
While at 0.7V or above the electricity is directed towards the output device via the anode leg.
When electricity drops back to under 0.7V the thyristor has to manually be deactivated to allow the electricity to be redirected to the cathode away from the output device.

23
Q

What does LED stand for?

A

Light Emitting Diode

24
Q

What is a diode used for?

A

Allow current to flow in only 1 direction
Protect a output component such as a motor.
Prevent back EMF (electromotive force)

25
Q

What are the legs on components made out of (LED)?

A

Lead

26
Q

What is the longer leg of a LED?

A

Anode or +ve lead

27
Q

What is the shorter leg of a LED called?

A

Cathode or -ve lead

28
Q

What are LEDs always used with and why

A

Resistor
Protect the component from a large spike in electricity

29
Q

What is a spst switch?

A

Single Pole Single Throw (Single Pole ON/OFF)

30
Q

What is a SPDT Switch

A

Single Poll Double Throw (Single Pole changeover)

31
Q

What are the 6 types of switches?

A

Micro
Push
Rocker
Slide
Toggle
Reed

32
Q

What is used to solder components onto a PCB?

A

Soldering Iron & Solder

Technology GCSE.Year11 (5 decks)

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