Grade 9; Electricity Flashcards
Series; what is the ME for Vt
Vt=v1+v2+v3
Series; what is the ME for Rt
Rt=r1+r2+r3
Series; What is the ME for It
it= i1=i2=i3
Parallel; what is the ME for Vt
Vt=v1=v2=v3
Parallel; What is the ME for It
It=I1+I2+I3
Parallel; What is the ME for Rt
Rt= 1/R1+1/R2+1/R3
What is Ohm’s Law
R-v/i
what is the power law
P=VxI
How do you find Cost?
power(in KW) + Time + Cost
Electrical Energy is measured in ?
joules
Which controls the flow of current
a switch
define charging by fricition?
rubbing or touching together two NEUTRAL object
define charging by contacts/conduction
touching two objects together when one has a charge
define charging by induction
no contact is made between two objects
what is electricity
a charge either positive or negative that exterts and electrical force
where are protons and neutrons found?
nucleus
where is the electron located
orbiting
What does the Law of Electrical Charges state?
- Like charges repel
- Opposites attract
- neutral objects attract BOTH because of induced charge separation
What are the parts of a circuit
a voltage source, load, switch, conduction paths
How do you calculate Electrical Efficiency
Energy out/Energy in x100
What’s Static Electricity
an imbalance of electric charge on the surface of an object
What is current electricly
the controlled flow of electrons through a conductor
What is a conductor
a material that lets electrons move easily through it
What is an Insulator
a material that does not easily allow the movement of electrons throughtout it
