Capacitors, Ammeters, & Voltmeters. Capacitors ◊ ◊ Capacitors store electrical potential energy by creating a separation of charge, usually on two parallel.

Slides:

Advertisements

Similar presentations

Current Electricity & Ohm's Law.

Advertisements

Circuits Electromotive Force Work, Energy and emf

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

Halliday/Resnick/Walker Fundamentals of Physics 8th edition

Unit 2 Day 3: Electric Energy Storage Electric potential energy stored between capacitor plates Work done to add charge to the capacitor plates Energy.

Q26.1 Which of the two arrangements shown has the smaller equivalent resistance between points a and b? A. the series arrangement B. the parallel arrangement.

Which of the two cases shown has the smaller equivalent resistance between points a and b? Q Case #1 2. Case #2 3. the equivalent resistance is.

© 2012 Pearson Education, Inc. Which of the two arrangements shown has the smaller equivalent resistance between points a and b? Q26.1 A. the series arrangement.

Capacitors insulating dielectric Capacitors store charge. They have two metal plates where charge is stored, separated by an insulating dielectric. To.

1 Capacitance and Dielectrics Chapter 27 Physics chapter 27.

Chapter 19 DC Circuits.

Chapter 19 DC Circuits. Units of Chapter 19 EMF and Terminal Voltage Resistors in Series and in Parallel Kirchhoff’s Rules EMFs in Series and in Parallel;

II. Electric current 1. Definition Units: [ I ] = 1A = 1 C/s Conventional current Electron flow Example: electrons passed through the electric conductor.

RC Circuits PH 203 Professor Lee Carkner Lecture 14.

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.

Electric current and direct-current circuits A flow of electric charge is called an electric current.

Electric Circuits  To calculate the size of a current from the charge flow and time taken Thursday, August 06, 2015.

II. Electric current 1. Definition Units: [ I ] = 1A = 1 C/s Conventional current Electron flow Example: electrons passed through the electric conductor.

Electricity Foundations of Physics. Electricity The movement of charge from one place to another Requires energy to move the charge Also requires conductors.

Measuring Current and Voltage. Current and Voltage ce/energy_electricity_forces/electric_current_ voltage/activity.shtml.

Series and Parallel Circuits. What is a Circuit?

My Chapter 18 Lecture Outline.

Circuits & Electronics

Electricity and Magnetism Topic 5.2 Electric Circuits.

Ch. 23 Series and Parallel Circuits Milbank High School.

Electric Currents Topic 5.2 Electric Circuits. Electromotive Force Defining potential difference Defining potential difference The coulombs entering a.

FCI. Direct Current Circuits: 3-1 EMF 3-2 Resistance in series and parallel. 3-3 Rc circuit 3-4 Electrical instruments FCI.

ELECTRICAL CIRCUITS. Ohm’s Law I = V / R Georg Simon Ohm ( ) I= Current (Amperes) (amps) V= Voltage (Volts) R= Resistance (ohms)

Circuit A complete path of conductors from the

Measurements in Electric Circuits Gr. 9 Electricity Unit.

Electricity Jeopardy Circuits 1 Circuits 2 Electric Current OhmExtra Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.

Electrodynamics – Science of electric charges in motion Flow Electric Charges May Occur: 1. In a vacum 2. In a gas 3. In ionic solution 4. In a metallic.

DC Circuits. EMF and Terminal Voltage Electric circuit needs a battery or generator to produce current – these are called sources of emf. Battery is a.

Chapter 28 Direct Current Circuits. Introduction In this chapter we will look at simple circuits powered by devices that create a constant potential difference.

Parts of An Electric Circuit Recall: a circuit is a closed path Electric circuit: closed path that flowing charge follows Constructing an electric circuit:

Electric Circuits.

Series Series circuits Current in series circuits Voltage in series circuits.

Ohm’s Law Calculating Current, Voltage, and Resistance.

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

Task : Copy and fill in the blanks Electrons are ………….. charged sub-atomic particles. They move around the circuit through ……………. materials such as metal.

Measuring Current and Voltage in Circuits. measuring current Electric current is measured in _______using an ammeter connected ________________ in series.

EMF and Internal Resistance Electricity Lesson 8.

Measuring Voltage and Current Aims Know the units of voltage and current Know how to measure voltage and current.

1 §18.1 Electric Current e-e- e-e- e-e- e-e- e-e- e-e- e-e- e-e- A metal wire. Assume electrons flow to the right. Current is a measure of the amount of.

Combo Circuits & EMF. How much current flows from the battery in the circuit below? 12V 400  500  700 

Series and Parallel Circuits

Chapter 19 DC Circuits. EMF and Terminal Voltage Any device that can transform a type of energy into electric energy is called a source of electromotive.

Current and Voltage, Series and Parallel Having measured the current and voltage in series and parallel circuits, I can design a circuit and show the advantages.

Chapter 13 Electric Energy and Capacitance. Electric Potential Energy The electrostatic force is a conservative force It is possible to define an electrical.

Chapter 20 Capacitors, Resistors and Batteries. Drift speed of ions in chemical battery: In usual circuit elements: In a battery:, assuming uniform field:

 To interpret and construct electrical circuit diagrams.  To identify series and parallel arrangements of elements.  To calculate the equivalent resistance.

Capacitors A capacitor is a device that has the ability “capacity” to store electric charge and energy.

Ohms Law, current electricity, series circuits

Measurements in Electric Circuits

II. Electric current 1. Definition a) Conventional current Electron

What are electric circuits?

Current electricity.

Internal Resistance in EMF

Measurements in Electric Circuits

Funny Little Symbols What do they mean?.

Topic H: Electrical circuits

Series and parallel circuits

Electrical energy By; Kemi and Kim.

Comparing Series and Parallel Circuits

Electricity and Magnetism

Components of an Electrical Circuit

ELECTRICAL CIRCUITS.

Electric Circuits.

Presentation transcript:

Capacitors, Ammeters, & Voltmeters

Capacitors ◊ ◊ Capacitors store electrical potential energy by creating a separation of charge, usually on two parallel plates Positive battery terminal pulls electrons from one plate and pushes them through the terminal to the opposite plate. Process continues until the ΔV of the plates = ΔV of the battery ◊ ◊ Capacitors are useful b/c they act like a temporary battery, but can discharge potential more quickly than a battery ◊ ◊ Examples: flash in a camera, amplifier in car audio system, detonator, particle accelerator Found in nearly all electronics! ◊

In practical use, we need to be able to measure currents through components and voltages across various components in electrical circuits. To do this, we use AMMETERS and VOLTMETERS. Ammeters and voltmeters

An ammeter – measures current passing through it is always connected in series with a component we want to measure in order that whatever current passes through the component also passes the ammeter. is always connected in series with a component we want to measure in order that whatever current passes through the component also passes the ammeter. has a very low resistance compared with the has a very low resistance compared with the resistance of the circuit so that it will not alter the current the current being measured. would ideally have no resistance with no potential would ideally have no resistance with no potential difference across it so no energy would be dissipated in it.

A voltmeter – measures voltage drop between two points is always connected across a device (in parallel). is always connected across a device (in parallel). has a very high resistance so that it takes very little has a very high resistance so that it takes very little current from the device whose potential difference is being measured. an ideal voltmeter would have infinite resistance with an ideal voltmeter would have infinite resistance with no current passing through it and no energy would be dissipated in it.

Why should an ammeter have very low resistance? Why should a voltmeter have very high resistance?

Why should an ammeter have very low resistance? - any resistance it has will lower the current (I = V/R), which is what you are trying to measure Why should a voltmeter have very high resistance? - so draws very LITTLE current, which would affect the voltage drop (V = IR)

How are ammeters connected to a circuit and why? How are voltmeters connected to a circuit and why?

How are ammeters connected to a circuit and why? - series, so that it can measure the current that passes through a point. How are voltmeters connected to a circuit and why? - parallel, to measure change in voltage across two points.