Ohms Law Benchmark Companies Inc PO Box 473768 Aurora CO 80047.

Slides:



Advertisements
Similar presentations
Current Electricity & Ohm's Law.
Advertisements

PSAA Curriculum Unit Physical Science Systems. Problem Area Energy and Power Systems.
Chapter 3 Ohm’s Law.
Foundations of Physical Science
Voltage and Current Benchmark Companies Inc PO Box Aurora CO
ELECTRONICS TECHNOLOGY INDUCTANCE
Circuits & Circuit Diagrams
Diagramming circuits. Ohm’s Law Mnemonic Definitions Current: the number of electrons that go through a wire in one second Voltage: the pressure that.
Unit 7 Parallel Circuits
1 SERIES CIRCUITS Benchmark Companies Inc PO Box Aurora CO
1 Parallel Circuits Benchmark Companies Inc PO Box Aurora CO
Ohm’s Law V IR Voltage Current Resistance. George Ohm published the Ohm’s Law formula The formula was based on his experiments with electrical.
Circuits Series and Parallel. Series Circuits Example: A 6.00 Ω resistor and a 3.00 Ω resistor are connected in series with a 12.0 V battery. Determine.
Before we get started, let’s review: Describe a Series Circuit.
Electric Circuits Electricity for Refrigeration, Heating and Air Conditioning 7th Edition Chapter 3 Electric Circuits.
Verification of OHM’s law By: Engr.Irshad Rahim Memon.
Voltage, Current, and Resistance
1 DC ELECTRICAL CIRCUITS OHMS LAW. 2 DC ELECTRICAL CIRCUITS Ohms law is the most important and basic law of electricity and electronics. It defines the.
Use Ohm’s Law to solve the following equations.
Objective of Lecture Explain mathematically how resistors in series are combined and their equivalent resistance. Chapter 2.5 Explain mathematically how.
Ohm’s Law The most important fundamental law in electronics is Ohm’s law, which relates voltage, current, and resistance. Georg Simon Ohm ( ) studied.
Series Circuits Circuits in which there is only one path for current to flow through All elements of the circuit (resistors, switches etc…) are in the.
Series, Parallel, and Series- Parallel Circuits
Copyright © Texas Education Agency, All rights reserved.
Chapter Twenty: Electric Circuits
Series and Parallel Circuits How to find the resultant resistance of an electronic circuit.
(1)A source voltage, that is, an electron pump usually a battery or power supply. [ ENERGY IN] (2) A conductor to carry electrons from and to the voltage.
Series Circuits EE 2010: Fundamentals of Electric Circuits Mujahed AlDhaifallah.
Calculating Electricity
EE2010 Fundamentals of Electric Circuits
1 HVACR216 - Hydronics Basic Circuits and Ohms Law.
ELECTRIC CURRENT 2 Ohm’s law shows the relationship between current, potential, and voltage. We need a few more rules to make predictions about current.
Circuits. V = IR Voltage is electric potential. It is measured in volts (V). I is current. This is the flow rate of electrical charge. It is measured.
RESISTANCE OF A SYSTEM OF RESISTORS Resistance can be joined to each other by two ways: Electricity Combination of Resistors 1. Series combination 2. Parallel.
SERIES RESISTORS AND VOLTAGE DIVISION In Fig the two resistors are in series, since the same current i flows in both of them. Applying Ohm’s law.
Ohm’s Law The relationship between Voltage, Current and Resistance in any DC electrical circuit was firstly discovered by the German physicist Georg Ohm,
Daily Sprint START 1. Turn in homework 2. Copy the objective 3. Describe what happens to a light if the resistance in a circuit increases.
Chapter 8. Ohm’s Law  George Ohm experimented with circuits and came up with a mathematical relationship relating voltage, current and resistance in.
Today we are going to look at: Current: Measured in “Amperes” or “Amps” (A) “The rate of flow of electrons through a circuit” Voltage: Measured in “Volts”
Electric Circuits. Electric circuit: a complete path from the positive terminal to the negative terminal.
Series & Parallel Circuits
Resistance and Ohm’s law. Resistance Some materials are better conductors than others. How do we quantify this difference? Electrical resistance R is.
Ohm’s Law Ohm’s Law Gateway To Technology
DC Circuits DC Circuits. Overview Ohms Law and Power Series Circuits Parallel Circuits Series Parallel circuits.
Review of V, I, and R Voltage is the amount of energy per charge available to move electrons from one point to another in a circuit, measured in volts.
HOW FAST IS A NANOSECOND?. ONE-BILLIONTH OF A SECOND!!!
Solving Problems 14.1 & A circuit contains 5-ohm, 3-ohm, and 8-ohm resistors in series. What is the total resistance of the circuit? Rt = R1.
Series and Parallel Circuits SNC1D. Series and Parallel Circuits Key Question: How do series and parallel circuits work?
Ohm’s Law Aim: How does voltage and resistance affect current flow?
Current Electricity.
Warm-up How much power is dissipated by an electric heater connected to a 120V outlet when a current of 12 amps passes through it? What are electric components?
WARM UP Draw a picture of a SERIES Circuit. Show a battery, a switch, and a light bulb in your drawing. Draw a picture of a PARALLEL Circuit. Show a battery,
Ohm’s Law.
16.3 OHMS LAW.
Unit 7 Parallel Circuits
October 2, 2017 Ohm’s Law.
Introduction to Electricity
Electric circuits e the significance of and the relationship between current, voltage and resistance.
Review of Calculations
Ohm’s Law The relationship between voltage, current and resistance is known as Ohm’s Law: V = IR Voltage (V) = Current (I) x Resistance (R) Volts.
Circuit Theory Laws Circuit Theory Laws Digital Electronics TM
Current Directions and
Basic Electrical Calculations
Circuit Theory Laws Circuit Theory Laws Digital Electronics TM
Ohm’s Law This formula shows the relationship between current, voltage and resistance. Voltage (Volts) Current (Amps) Resistance (Ohms, )
Electrical Circuits Properties of an electrical circuit include Voltage Volts V Current Amps A Resistance Ohms Ω.
What formula is used to calculate current in a circuit?
Ohm’s Law Page
Series and Parallel Circuits
Presentation transcript:

Ohms Law Benchmark Companies Inc PO Box Aurora CO 80047

Ohms Law Ohm's law is the most important, basic law of electricity. It defines the relationship between the three fundamental electrical quantities: current (I), voltage (V), and resistance (R).

Ohms Law The mathematical equation that shows the relationship between electric voltage, current and resistance. Ohms Law was named after Bavarian mathematician and physicist Georg Ohm.

Ohms Law When a voltage is applied to a circuit containing only resistive elements (i.e. no coils), current flows according to Ohm's Law. V=IR

Ohms Law Ohm's law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R).

Ohms Law In other words, if the voltage is increased, the current will increase provided the resistance of the circuit does not change.

Linearity of Voltage and Current for Resistors which Obey Ohms Law Voltage and current are linear when resistance is held constant.

Ohms Law Example: If the circuit has a 100 Ohm resistor and the voltage is increased from 12 Volts to 24 Volts, the current will increase. Likewise if the voltage is drop from 24V to 12V, the current will decrease.

Ohms Law Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed.

Ohms Law Example: If the circuit has a 12V supply and the resistance is increased from 100 Ohms 200 Ohms, the current will decrease. Likewise if the resistance is reduced from 200Ohms to 100Ohms, the current will increase.

Ohms Law The formula can be reorganized so that the relationship can easily be seen for all of the three variables.

Ohms Law Exercise: Verify Ohms Law by substituting values in each equation below. V = I x R R = V / I I = V / R

Ohms Law It should be evident that knowing any two of the values of a circuit, one can determine the third using Ohms Law. V = I x R R = V / I I = V / R

Ohms Law Another useful equation to know is the power equation: P = E*I (power equals voltage multiplied by current or watts = volts * amps).

Ohms Law From this we can substitute Ohm's law for any values we don't know. For instance if we need to know power but we only have amperage (I) and resistance (R) then we could substitute I*R in the power equation (because according to Ohm's law E=I*R) and get P = I*R*I.

Ohms Law Now that we have established a direct relationship with Power, Voltage, Current and Resistance, knowing any two of the values of a circuit, one can determine the third and fourth values using Ohms Law and the Power Formula.

Ohms Law This graphic is a good tool to use for solving any number of combinations of Ohms Law.

Experiment 1 One 10 ohm resistor connected to the battery. Connect a second 10Ω resistor in parallel to the first one Q:What will the new resistance be? What will happen to the current through each resistor and the voltage across each component of the circuit?

Conclusion V = I x R Ohms Law P = I x V Power Formula

End of Presentation