Presentation is loading. Please wait.

Presentation is loading. Please wait.

Resistance and Ohm’s Law

Published byIvan Dharmawijaya Modified over 6 years ago

Similar presentations

Presentation on theme: "Resistance and Ohm’s Law"— Presentation transcript:

1 Resistance and Ohm’s Law
SPH4C

2 Resistance is the property of substances that impedes the free flow of electrons.

3 Resistance is the property of substances that impedes the free flow of electrons. It is measured in units of Ohms (W). Resistance

4 Loads such as lights and heating elements have a resistance: they impede the flow of electrons and convert the energy of electrons into another form of energy such as light or heat. Loads and Resistance

5 A resistor is a load placed in a circuit simply to impede the flow of electrons and thus control the current to the rest of the circuit. Resistors

6 Resistors and Resistance
The resistance of a resistor is typically indicated by colour-coded bands: Resistors and Resistance

7 Resistors and Resistance
The resistance of a resistor is typically indicated by colour-coded bands: Resistors and Resistance

8 Resistors and Resistance
The resistance of a resistor is typically indicated by colour-coded bands: Resistors and Resistance

9 Resistors and Resistance
The resistance of a resistor is typically indicated by colour-coded bands: Resistors and Resistance

10 Resistance and Current
The current that flows through a resistor will be equal to: Resistance and Current

11 Resistance and Current
The current that flows through a resistor will be equal to: This is called Ohm’s Law and often written: Resistance and Current

12 If a 50-W resistor is connected to a 1
If a 50-W resistor is connected to a 1.5 V battery, what is the current through the resistor? Example

13 If a 50-W resistor is connected to a 1
If a 50-W resistor is connected to a 1.5 V battery, what is the current through the resistor? Example

14 If a 50-W resistor is connected to a 1
If a 50-W resistor is connected to a 1.5 V battery, what is the current through the resistor? Example

15 If a 50-W resistor is connected to a 1
If a 50-W resistor is connected to a 1.5 V battery, what is the current through the resistor? Example

16 If a 50-W resistor is connected to a 1
If a 50-W resistor is connected to a 1.5 V battery, what is the current through the resistor? Example

Download ppt "Resistance and Ohm’s Law"

Similar presentations

Ohm’s Law.

Ohm’s Law.
Diagramming circuits. Ohm’s Law Mnemonic Definitions Current: the number of electrons that go through a wire in one second Voltage: the pressure that.

Diagramming circuits. Ohm’s Law Mnemonic Definitions Current: the number of electrons that go through a wire in one second Voltage: the pressure that.
Cells have positive and negative electrodes.

Cells have positive and negative electrodes.
Resistor Code How to read the value of a resistor.

Resistor Code How to read the value of a resistor.
Electricity.

Electricity.
20-2: Resistors in Series and Parallel Objectives: Calculate the equivalent resistance for a circuit of resistors in series, and find the current in and.

20-2: Resistors in Series and Parallel Objectives: Calculate the equivalent resistance for a circuit of resistors in series, and find the current in and.
Current Electricity.

Current Electricity.
Circuits & Electronics

Circuits & Electronics
Current Electricity. 11.1 Electric Current Circuit – continuous conducting path between terminals of a battery (or other source of EMF) Electric Current.

Current Electricity Electric Current Circuit – continuous conducting path between terminals of a battery (or other source of EMF) Electric Current.
Series, Parallel, and Series- Parallel Circuits

Series, Parallel, and Series- Parallel Circuits
Electric Circuits with Multiple Loads 10.7. Some electric devices, such as calculators, simple cameras, and flashlights, operate only one electric load.

Electric Circuits with Multiple Loads Some electric devices, such as calculators, simple cameras, and flashlights, operate only one electric load.
4.2.3A Ohm’s Law & Circuit Basics Why Make Electrons Flow Anyway?

4.2.3A Ohm’s Law & Circuit Basics Why Make Electrons Flow Anyway?
REVIEW OF ELECTRICITY IT’S LIKE A LESSON THAT ASSUMES YOU ALREADY LEARNED THIS STUFF!

REVIEW OF ELECTRICITY IT’S LIKE A LESSON THAT ASSUMES YOU ALREADY LEARNED THIS STUFF!
Circuits, Volts, Amps, and Resistance. Series circuits Simple circuits that have only one path for the current to flow are called series circuits.

Circuits, Volts, Amps, and Resistance. Series circuits Simple circuits that have only one path for the current to flow are called series circuits.
Electrical Resistance and Ohm’s Law Electric circuits are used to convert electrical energy into some other form of energy we need.

Electrical Resistance and Ohm’s Law Electric circuits are used to convert electrical energy into some other form of energy we need.
Electrical Potential (Voltage) Answers (Page 303)

Electrical Potential (Voltage) Answers (Page 303)
CURRENT ELECTRICITY Characteristics of Current Electricity.

CURRENT ELECTRICITY Characteristics of Current Electricity.
4.2.3B Electrical Power What About Watts?. Power Law Moving electrons (current) requires ENERGY How much energy gets used depends on: Strength of push.

4.2.3B Electrical Power What About Watts?. Power Law Moving electrons (current) requires ENERGY How much energy gets used depends on: Strength of push.
Circuits and Ohm’s Law Objectives: 1. Gain an understanding of Ohm’s Law. 2. Compare and contrast the movement of current through a series and parallel.

Circuits and Ohm’s Law Objectives: 1. Gain an understanding of Ohm’s Law. 2. Compare and contrast the movement of current through a series and parallel.
Resistance.

Resistance.

Similar presentations

Ads by Google