ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Slides:



Advertisements
Similar presentations
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
Advertisements

S.MORRIS 2006 ELECTRICAL CIRCUITS More free powerpoints at
ELECTRICAL CIRCUITS.
S.MORRIS 2006 Electricity and Magnetism More free powerpoints at All you need to be an inventor is a good imagination and a pile.
Topic 2 Electricity Within a Circuit. Static and Current Electricity: When charged particles build up in an object it is called static electricity. Another.
1 ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
Do Now (10/14/13):  What is Ohm’s Law?  What do you know about electric circuits?  In your own words, what is electric current?
Series and Parallel Circuits. Ohm’s Law I = V / R Georg Simon Ohm ( ) I= Current (Amperes) (amps) V= Voltage (Volts) R= Resistance (ohms)
ELECTRICAL CIRCUITS. Ohm’s Law I = V / R Georg Simon Ohm ( ) I= Current (Amperes) (amps) V= Voltage (Volts) R= Resistance (ohms)
Electricity Electrical conductors and insulators.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS.
ELECTRICAL CIRCUITS.
ELECTRIC CIRCUITS. I. Circuits A flow of electrons is called a current.  Symbol - I  Unit is Amperes or Amps (A)  I = q/t  Current is amount of charge.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
Ohm’s Law V = I x R Georg Simon Ohm ( ) I= Current (Amperes or amps) V= Voltage (Volts) R= Resistance (ohms)
Current Electricity 1. What is Electric Current? Electric current is the flow of electricity through a conductor. The current is caused by the movement.
S.MORRIS 2006 ELECTRICAL CIRCUITS More free powerpoints at
Simple Circuits Series circuit –All in a row –1 path for electricity –1 light goes out and the circuit is broken Parallel circuit –Many paths for electricity.
Measuring Current and Voltage in Circuits. measuring current Electric current is measured in _______using an ammeter connected ________________ in series.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
REVIEW of Static electricity Electricity A. Electric Charge 1. Static electricity is the accumulation of excess electric charges on an object. a. More.
Electricity and Circuit. Types of Electricity Static Electricity – no motion of free charges Current Electricity – motion of free charges – Direct Current.
Electrical Current & Circuits By Mr.yasser science.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
INTRODUCTION TO ELECTRIC CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison What we’ll cover today: 3 characteristics.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS.
Electricity and Circuit
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
How to Work Electrical Circuits
Chapter 17 Current electricity
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL Currents & Energy
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS S.MORRIS 2006
Electrical Circuits.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison Lesson Objectives: To explain the difference.
Electrical Circuits.
Topic H: Electrical circuits
ELECTRICAL Currents & Energy
ELECTRICAL CIRCUITS WALT - Explain how electrons flow through a circuit S.MORRIS 2006 More free powerpoints at
ELECTRICAL CIRCUITS S.MORRIS 2006
Circuits.
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
REVIEW of Static electricity
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
Title: 2/28 ELECTRICAL CIRCUITS
Components of an Electrical Circuit
ELECTRICAL CIRCUITS.
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS More free powerpoints at
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS S.MORRIS 2006
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.
Presentation transcript:

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison

I = V / R Ohm’s Law I = Current (Amperes) (amps) V = Voltage (Volts) R = Resistance (ohms) Georg Simon Ohm (1787-1854)

How you should be thinking about electric circuits: Voltage: a force that pushes the current through the circuit (in this picture it would be equivalent to gravity)

How you should be thinking about electric circuits: Resistance: friction that impedes flow of current through the circuit (rocks in the river)

How you should be thinking about electric circuits: Current: the actual “substance” that is flowing through the wires of the circuit (electrons!)

Would This Work?

Would This Work?

Would This Work?

The Central Concept: Closed Circuit

circuit diagram Scientists usually draw electric circuits using symbols; cell lamp switch wires

Simple Circuits Series circuit Parallel circuit All in a row 1 path for electricity 1 light goes out and the circuit is broken Parallel circuit Many paths for electricity 1 light goes out and the others stay on

Series Circuits Parallel Circuits only one end of each component is connected e.g. Christmas tree lights Parallel Circuits both ends of a component are connected e.g. household lighting

measuring current Electric current is measured in amperes (A) using an ammeter connected in series in the circuit. A

measuring current A A This is how we draw an ammeter in a circuit. PARALLEL CIRCUIT SERIES CIRCUIT

measuring current SERIES CIRCUIT current is the same at all points in the circuit. 2A 2A PARALLEL CIRCUIT 2A 2A current is shared between the components 1A 1A

measuring voltage The ‘electrical push’ which the cell gives to the current is called the voltage. It is measured in volts (V) on a voltmeter V

This is how we draw a voltmeter in a circuit. measuring voltage This is how we draw a voltmeter in a circuit. V V SERIES CIRCUIT PARALLEL CIRCUIT

measuring voltage Different cells produce different voltages. The bigger the voltage supplied by the cell, the bigger the current. Unlike an ammeter, a voltmeter is connected across the components Scientist usually use the term Potential Difference (pd) when they talk about voltage.

measuring voltage V V V V

voltage is shared between the components series circuit voltage is shared between the components 3V 1.5V 1.5V

voltage is the same in all parts of the circuit. parallel circuit voltage is the same in all parts of the circuit. 3V 3V 3V

Copy the following charts into your journal and fill-in the missing information for both current and voltage.

measuring current & voltage

measuring current & voltage b) 6V 4A A V A V A

answers a) b) 6V 6V 4A 4A 6V 4A 4A 3V 3V 2A 4A 6V 2A

Voltage, Current, and Power One Volt is a Joule per Coulomb (J/C) One Amp of current is one Coulomb per second (6.24 x10^18 electrons/second). If I have one volt (J/C) and one amp (C/s), then multiplying gives Joules per second (J/s) this is power: J/s = Watts So the formula for electrical power is just: More work is done per unit time the higher the voltage and/or the higher the current P = V x I power = voltage  current