Dynamic Electricity.

Slides:

Advertisements

Similar presentations

+ V (Volt) = W (work done, J) Q (charge, C)

Advertisements

Cells have positive and negative electrodes.

Electricity refers to the presence of electric current in wires, motors, light bulbs, and other devices. Electricity carries power. Power (P)

Do Now What work is required to move 7 coulombs of charge through a potential difference of 3 volts?

Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Final Exam Review Current, Power, Voltage, Resistance Ohm’s Law Series & Parallel Circuits Electromagnetic Induction.

Electrical Current Mr. Fleming.

Part II: Electrochemistry Electricity is generated by the movement of charged particles, in which opposite charges ___________ one another and like charges.

 Electricity is caused by the flow (or net movement) of Electrons  Electric Current – the rate that positive charges flow in a circuit › Actually a.

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.

Chapter 7 Electricity. What is Charge? Protons have a (+) charge Electrons have a (-) charge Charge (q) is measured in Coulombs The elementary charge.

Bellringer A standard household outlet has a voltage of what?

Voltage, Current, Resistance and Power. Voltage Voltage is the ____________________________ through an electric circuit. Voltage is measured in _____.

Electrical Resistance Electrical resistance is a measure of how difficult it is for electricity (electrons) to flow through a material. The units of resistance.

Electric Circuits. Potential Electric Potential is just like gravitational potential It depends on –The distance from the source –The amount of charge.

Electricity. Electric Current The net movement of electric charges in a single direction Electrons in a material (metal wire) are in constant motion in.

Electrical Systems. VOCABULARYOBJECTIVES  Series circuit  Voltage drop  Kirchoff’s Voltage Law Describe a series circuit. Calculate the resistance.

describes the relationship between current, voltage, and resistance greater the voltage across a device with resistance, the greater the current through.

Electric Current. In this session we will, Review how we measure electric charge Discuss voltage and electric current Look at electric current in batteries.

 Electric Current- net movement of electric charges in a single direction ◦ Example- powering electronics.

ELECTRIC CURRENTS. SIMPLE CIRCUIT What’s providing the energy? What’s “moving” in the circuit? What’s causing the movement? e.m.f. = Electromotive Force.

Electric Current. Ohm’s Law

Electricity and Circuit. Types of Electricity Static Electricity – no motion of free charges Current Electricity – motion of free charges – Direct Current.

Measuring Electricity. Electric Potential – the electrical energy that an electron possesses. Electric current is a measure of the rate at which the electric.

Jag Mark Name 4 factors that can affect the resistance of a current?

Electric Current Electric current – The net movement of electric charges in a single direction through a wire or conductor. Voltage difference – The force.

ELECTRICAL CIRCUITS.

Electricity Cont… Turk.

Chapter 7 Section 2.

13.7 Factors Affecting Series Circuits

Recall that when two conducting objects at different potentials are connected by a conducting wire, charge flows from the object at a higher potential.

Electricity and Circuit

Do Now: Why does current not come from a battery? Explain.

Aim: How can we describe current?

Warm Up #13 What is an electric current?.

7-2: Electric Current.

Ch Electricity II. Electric Current (p ) Circuit

Ch Electricity II. Electric Current Circuit Potential Difference

Resistance in Circuits

Bellwork What is required for electric current to flow?

Chapter 7 section 2 Electric Current

Bellwork What is required for electric current to flow?

ELECTRICAL CIRCUIT BOARDS

Basic EE Practice Theory Power supply Charge Breadboards Current

FIGURE 5-1 A series circuit with three bulbs

Basic EE Practice Theory Power supply Charge Breadboards Current

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.

Electric Current and Electrical Energy

Electric Current.

Series Circuit.

Electrons in Circuits. Electrons in Circuits Parts of a circuit Battery Closed switch (allows electrons to flow) Open switch (impedes flow) Wire Resistor.

Ch Electricity II. Electric Current (p ) Circuit

Current and Resistance

Ohm’s Law and Circuit Basics

Chapter Twenty One: Electrical Systems

Electricity II. Electric Current Circuit Potential Difference Current

Please bring your book tomorrow.

Ohm’s Law & Circuits Chapter 7.2 & 7.3.

Voltage Difference The difference in electrical potential between two places. Unit of measure = V (volts) Voltage causes current to flow through an electric.

Announcement Ohm’s law video is due at midnight Makeup lab today

Electric Current Chapter 34.

Electric Circuits Chapter 35.

Basic Circuits.

FIGURE 5-1 A series circuit with three bulbs

Electric Resistance describes how an electrical conductor (wire) opposes the flow of a current (flow of electrons) to overcome this opposition a voltage.

Chapters 18 & 19 What is the definition of electric potential?

Current and Ohms law.

Presentation transcript:

Dynamic Electricity

Direction of current Why the bulb can be on? Electricity exist because of flowing electron Direction of current Based on the consensus among scientists Electric current is flowing electron Electric current flows from positive to negative pole (from higher potential to lower potential) The direction of Electron flow is reversed to the direction of the electric current

What’s electric current? Electric current (I) is a number of electric charge (q) that is flowing per second (t) I = q/t Note: I = Electric current (A) q = Electric charge (C) t = time (s) PROBLEM A wire flows 12000 electron per minute, how much electric current is flowing in this wire ? (you have known that electron charge = 1,6. 10-19 C) Know : ∑ electron = 12000/minute Question : I = ….? Solution : I = q/t = 12000 (1,6. 10-19 )/60 = 3.2. 10-17 A

My Charge is 1728 Coulomb. I Catch a light on and on with flowing 0.02 A of electric current. How many days will I be empty 1. A wire that is current flowing 32 A, How many electron is flowing on this wire during 2 second 2.

What do we need to produce electricity to power a bulb? Electric energy source Cable  path of electron move Closed Circuit Closed and Open circuit A.Closed  all parts connected B.Open  disconnected part B A

Ohm’s Law If The voltage (v) is higher, Its current (I) will also be higher, and if it has lower voltage the current will also be lower. If The Resistance (R) is higher, Its current (I) will be lower and if it has lower resistance the current will be higher. Note : R = Resistance (Ω) V = Voltage (Volt/V

PROBLEM Using Ohm’s Law, what is the current flowing in 10 Ω Resistor, if the voltage is 5 V Calculate the current flowing in 6 Ω wire connected to a 12 V accumulator. What is the current if the wire is connected to 6 V battery?