Static Electricity
Electricity is due to the movement of ______
Electrons
This device is used to measure the current in an electric circuit
Ammeter
This is the only form of charging that doesn't require contact
Charging by Induction
An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.
R = V/I
= 120V/0.5A
=240 ohms
What unit do we use to measure current ?
When two like charges get close to each other, they will ________
Repel
This device is used to measure the voltage in an electric circuit
Using the electrostatic series, what'd be the charge of the following items after rubbing them against each other.
-Human Hair
-Wool
Human Hair: Positive (relatively)
Wool: Negative (relatively)
If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit?
I = V/R
=120V/12 ohms
= 10A
the largest form of static electricity we observe in real life (think weather)
What is lightning?
The part of a circuit that controls the movement of electrons (whether they move or not)
What is a switch?
Using the electrostatic series, what'd be the charge of the following items after rubbing them against each other.
-Rubber Balloon
-Wool
Rubber Balloon: Negative
Wool: Positive
A light bulb has a resistance of 5 ohms and a maximum current of 10 A. How much voltage can be applied before the bulb will break?
V = I x R
=10A x 5 ohms
= 50 V
In most computers and phones, a __________ is used as it allows for electricity to be conducted, but only to a certain amount.
semiconductor
a negatively charged balloon and a neutral wall will...
Attract
the 4 main parts of any circuit are:
Switch, load, battery, and connector wires
What are the three main forms of charging ?
Charging by Friction
Charging by Conduction
Charging by Induction
What happens to the voltage in a circuit if the current is increased from 1.5A to 3.0 A
The voltage will be doubled.
When the electrons from the battery goes a full cycle without going through any load/resistor, it will cause a _________
What is a short circuit
removal of excess electrons from an object
What is electric discharge?
The total ________ in a series circuit is always the same.
The total ________ in a parallel circuit is always the same.
Current (I)
Voltage (V)
If I'd want to make a grounded object positively charged by induction. I'd need to put an object that is ______ charged close by.
Negatively
What happens to the current in a circuit if a 10Ω resistor is removed and replaced by a 20Ω resistor?
The current will be reduced by half.
Why are the circuits at our homes mostly parallel circuits ?
Because when one load doesn't work, the others will still work.