Ohm's Law
Current Affairs
Draw the circuit
Series and Parallel
Resistance
100
What is the formula for Ohm's Law?
V=I/R
100
What is the unit of current
Ampere
100
1 bulb and 1 cell
100
In this circuit, all components are connected in a row
Series
100
The symbol for resistance
Ω
200
What is the resistance if I have 20 V and 20 A?
1 Ω
200
What is current?
The flow of electrons
200
2 cells, 1 bulb, 1 open switch
200
What type of circuit is the following image
200
What is resistance?
Impeding flow of electrons
300
What is the current if I have 20 V and 20 Ω ?
1 A
300
How are ammeters connected in a circuit, series or parallel?
300
1 cell, 2 bulbs in parallel, 1 voltmeter measuring the potential difference across the cell.
300
In this type of circuit, if one lightbulb blows, the entire circuit doesn't work
Series
300
Effect of Temperature on resistance
increase temperature, increase resistance
400
what is the resistance across 1 of the bulbs if the ammeter reads 1 A?
5 Ω
400
How are voltmeters connected in a circuit, series or parallel?
Parallel
400
1 cell, 2 bulbs in parallel,
2 ammeters, 1 measuring the current on each branch of the parallel circuit
400
In this type of circuit, voltage is split among the lightbulbs
series
400
When you increase the length of the wire, this happens to the resistance.
resistance increases
500
What is the resistance across the bulb if the ammeter reads 4 A?
6 Ω
500
How would you increase the current in a circuit?
Increase voltage
Decrease resistance
500
1 cell.
3 bulbs, 2 in series with each other and 1 parallel to the other two.
4 voltmeters, measuring the potential difference across each bulb and the cell.
1 closed switch that will only turn off the two lightbulbs in series.
500
in this type of circuit, current is split through the circuit
parallel
500
What type of material has low resistance and why?
conductors allow electrons to freely move.