STATIC ELECTRICITY
What is STATIC ELECTRICITY?
THE BUILDUP OF ELECTRIC CHARGES IN ONE PLACE
What is an electric "circuit"?
A CLOSED PATHWAY THAT CAN CARRY AN ELECTRIC CURRENT
A car headlight needs a current of 15 A. How much charge is needed for it to light up for 1 whole minute?
I = q/t
900 C
What is ELECTRIC CURRENT?
A FLOW OF ELECTRIC CHARGES
It is impossible to create a monopole.
True
TRUE OR FALSE:
IF I RUB A BALLOON ON MY HEAD THEN TOUCH SCRAPS OF PAPER, THE BALLOON WILL ATTRACT THE PAPER.
TRUE
What type of circuit only has ONE PATH FOR CURRENT?
SERIES CIRCUIT
What is the amount of energy transferred in a circuit that is powered by a 120 V battery and has a charge of 200 C?
Use this formula:
V = E/q
240 000 J
What is RESISTANCE?
HOW MUCH A MATERIAL OPPOSES, OR RESISTS, THE FLOW OF ELECTRIC CURRENT.
What is a magnet?
An object containing Fe, Co or Ni.
When a charged object comes into contact with a neutral object and gives it the same charge, this method of charging is called...
Conduction
There is a series circuit with many lightbulbs.
IF ONE BULB IS DAMAGED, what happens to the other light bulbs?
They stop lighting up.
Use Ohm's Law to calculate the current of a circuit powered by a 5 V battery and a 5 ohm resistor.
V = IR
I = 1 A
What is a switch in an electrical circuit?
An electrical component which opens and closes an electric circuit (on and off).
If you microscopically zoom in on iron, you will see many tiny areas called ______. Each one acts like a tiny ________.
domains
magnet
In friction, the object with a HIGHER ELECTRON AFFINITY is more likely to __________ electrons and become ______________ charged.
gain, negatively
Give two examples of how parallel circuits are different from series circuits.
Parallel circuits have more than 1 path for current.
The components (like lightbulbs, resistors) do not stop working on all branches if a lightbulb stops working on one branch.
Find the electrical energy, in Joules, if a 1000 W microwave operates for 6 minutes.
360 000 J
What are the units and meanings for each symbol in this equation?
P = W/t
P is power (watts W)
W is work (joules J)
t is time (seconds s)
Magnetic field lines are drawn from ___ to ___.
North, South
Give an example of electrostatic discharge.
Sample answers:
Lightening, Opening a door after walking on carpet
TRUE OR FALSE: IF YOU ADD MORE BULBS TO A SERIES CIRCUIT THE BULBS WILL BECOME BRIGHTER. Explain.
FALSE
The voltage is being distributed over all the lightbulbs, so each one gets less power.
Find the electrical energy, in Kilowatt hours, if a 1000 W microwave operates for 6 minutes.
0.1 kWh
What is electromagnetism?
All the phenomena resulting from interaction between electricity and magnetism
Describe the right hand rule for a live wire.
Thumb points in direction of ________.
Fingers curl in direction of _________.
Thumb points in direction of conventional current.
Fingers curl in direction of magnetic field lines.