Robotics Presentation

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Resistors

Lesson 2

Electronics

Recap: Ohms law and resistance

SECTION 01

1. There is not enough resistance in a circuit
2. Current flows through components in that circuit

What happens when...

SECTION 01

Ohm's Law

SECTION 01

+ Questions

• Voltage: Volts (V)
• Current: Amps (A)
• Resistance: Ohms (Ω)

What units do we measure each of these in?

Ohm's law

SECTION 01

If you have a resistance of 3Ω, calculate the current for the voltage values below

Double the current

Double the voltage

If you have a resistance of 3Ω, calculate the current for the voltage values below

If you have a voltage of 6V, calculate the current for the resistance values below

Halve the current

Double the resistance

If you have a voltage of 6V, calculate the current for the resistance values below

Types of resistor

SECTION 02

Create a table of your answers.

• Name of resistor
• How it functions
• What is the symbol
• Common applications

Research different types of resistors. Key points to look up:

Research

SECTION 02

What about this resistor tells us the amount of resistance it provides?

Will one type of resistor work for every circuit?

+/- 2%

x 1 Ω

Tolerance

Multiplier

"2nd" column

"1st" column

What does each one mean?

Resistor bands

The same applies for amps: 1 kA = 1,000 A and 1 MA = 1,000,000 A

1 MΩ = 1,000,000 Ω

One megaohm is equal to 1,000,000 ohms

1 kΩ = 1,000 Ω

One kiloohm is equal to 1,000 ohms

What did you notice about the units of ohms?

See how quickly you can complete the conversion game

Match the resistors to the correct value

Activity

SECTION 02

What is the Resistance?

What is the current?

What is the voltage?