Karteikarten
Electricity
Karten in diesem Stapel (36)
- 1What is electricity?Electricity describes all the phenomena caused by positive and negative charges. It is the main form of energy that we use in our everyday lives.
- 2How was electricity discovered?Electricity was discovered when amber rubbed against wool
- 3What is electrical charge?Electrical charge is a property of protons and electrons. (q)
- 4What is the unit of measurement for electrical charge?Coulomb (C)
- 5What is the force at work called in the attraction or repulsion between charges?Electrical force
- 6What does charging of an object consist of?Charging an object consists of creating an imbalance in the electrical charge of that object.
- 7What are the categories of how objects react upon receiving electrical charges?Conductors, Insulators, Semi-conductors
- 8What is an electrical field?An electrical field is the area of space in which the electrical force of a charged body can act on another charged body.
- 9What is static electricity?Static electricity describes all the phenomena related to electrical charges at rest.
- 10When two objects of the same charges come together, the quickly lose their charge, usually accompanied by a spark. What is this called?Electrostatic discharge
- 11How can objects be charged?Objects can be charged by friction, conduction or induction.
- 12What does friction consist of?Friction consists of rubbing two neutral bodies together, resulting with two bodies of opposite charges.
- 13What does conduction consist of?Conduction consists of an object being charged from another object that has already been charged.
- 14What does induction consist of?Induction consists of when an electrically charged object approaches a neutral object (without the need to touch it)
- 15What does Coulomb's law describe?Coulomb's law describes the magnitude of the force between two electrically charged particles.
- 16What is the equation for Coulomb's law?F= k q1 q2 / (r)2
Where F=Force (N)
k= Coulomb constant [ 9x(10)9 Nm2 / C2 ]
q1 & q2= charges (C)
r= distance between charges (m) - 17What does dynamic electricity describe?Dynamic electricity describes all the phenomena related to electrical charges in motion.
- 18In an electrical circuit, what is the direction of particles?Positive particles to negative particles.
- 19What are generators?Generators transform mechanical energy into electricity.
- 20What do all circuits contain?All circuits contain a power supply to create potential difference and one or more elements that use electrical energy (when 2 or more elements, they can be set up in series or parallel circuits)
- 21How can we tell between series and parallel circuits?We can tell by the paths- in a series circuit, the current follows one path and in a parallel circuit, the current follows different paths
- 22If one lightbulb goes out, which circuit's current with continue to flow?The parallel circuit.
- 23What is current intensity?Current intensity is the number of charges that flow past a given point in an electrical circuit every second.
- 24How is current intensity measured and using what unit of measurement?Current intensity (I) is measured using ammeters and measured in amps (A)
- 25Which side is the ammeter located?The positive side
- 26In a series circuit, is the current intensity (I) the same or shared? And for a parallel circuit?Series circuit- current intensity is the SAME
Parallel circuit- current intensity is SHARED - 27How can current intensity be calculated?I= q /
- 28What is potential difference?Potential difference is the amount of energy transferred between two points in an electrical circuit. (V)
- 29How is potential difference measured and using what unit of measurement?Potential difference is measured with a voltmeter that can be installed on either side of the circuit. It's unit is volt (V)
- 30What is the equation that determines the potential difference between two points?V= E / q
Where V=voltage (volts V)
E= energy transferred (joules J)
q= charge (coulombs C) - 31What do resistors do in a circuit?Resistors can change electrical energy into another form Ex/into thermal energy
- 32What is the unit of measurement for resistance? What is the equation of resistance?Ohms (omega sign).
1(omega)= 1V/ 1A
Where omega= ohm
V=volt
A= amps - 33What is Ohm's Law?Ohm's Law: V=RI
Where V=potential difference (volts)
R=Resistance (ohms)
I=Current intensity (amps) - 34What does electrical power indicate? What is the unit of measurement?Electrical power indicates the amount of work a device can do in a certain period of time. It's unit of measurement is watts (W) & Kilowatt hours (kWh)
- 35What is equivalent to one watt?1 W= 1J / 1s
Where W=watt
J=joule
s=second - 36What is the equation for electrical power?Pe= W /
Informationen
- Beschreibung
- Science (Electricity and Magnetism) Karteikarten am Electricity, erstellt von hiphop4hope am 14/06/2015.
- Erstellt von
- hiphop4hope
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- 10
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