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WorksheetsU7: Ohm's Law and Circuits Review
Total questions: 20
Worksheet time: 9mins
What would you need to do to the voltage if you wanted to increase the current in a series circuit?
Increase
Greater
Decrease
Smaller
What is the unit of current?
volts (V)
amps (A)
ohms (Ω)
joules (J)
What is the difference in finding total resistance in a series circuit vs. in a Parallel circuit?
No Difference
For series use inverse equation, for parallel add resistances up.
For series add up resistances, for parallel add up resistances
For series add up resistances, for parallel use inverse equation
If a series circuit of three bulbs is rearranged into a parallel circuit, what will happen to the brightness of three bulbs
The bulbs will turn off due to an incomplete supply of electricity.
All three bulbs will have the same amount of luminosity once rearranged into a parallel circuit but will be dimmer than in parallel.
All three bulbs will have the same amount of luminosity once rearranged into a parallel circuit but will be brighter than in parallel.
The bulb next to the battery will be brightest and each bulb will be dimmer than the one before.
What does R stand for?
Revolution
Rictor Scale
Resistance
Right
Johnny and Sam are working on a physics lab together. In their lab, they are to create both a series circuit and a parallel circuit using identical materials. Johnny constructs the series circuit while Sam makes the parallel circuit. After observing the two circuits, Sam argues that his circuit contains more resistance than Johnny's circuit. Johnny says that Sam is wrong, and that his circuit has more resistance. Who is correct?
Sam is correct, the parallel circuit has more paths for the electricity to travel, making the resistance greater.
Sam is correct, the parallel circuit's light(s) is brighter, meaning there is more resistance.
Johnny is correct, parallel circuits have LESS resistance because the current is greater.
Johnny is correct, parallel circuits have LESS resistance because their resistors add inversely, while the resistors in series circuits add normally.
What is the first step to solving for a Parallel circuit
Add the currents to find the total currents
Find the current through each branch I= v/r for each branch
Use the one current to find the voltage drop across each resistor
Check by adding resistors using inverse law
For which circuit do you have to inverse the resistors to find the equivalent resistance?
series circuit
parallel circuit
both series and parallel circuits
neither series and parallel circuits
Which variable in Ohm’s law represents the flow of electrons (much like the flow of a river)?
resistance
current
voltage
Which variable in Ohm’s law is like friction that slows down the flow of electrons?
resistance
current
voltage
As the voltage increases, the current...
increases
decreases
stays the same
Resistance and current are
directly proportional
inversely proportional
not related
The circuit shown is a parallel circuit.
True
False
What would happen if you closed the switch (meaning you connected it)?
Bulb A would turn off, but the others would stay on
Bulbs B and C would turn off and bulb A would stay on
All bulbs would turn off
All bulbs would stay on
Starting with all bulbs on, what would happen if bulb B burned out?
Bulb A would turns off and bulb C would stay on
Bulb C would turns off and bulb A would stay on
Both bulb A and bulb C would turn off
Both bulb A and bulb C would turn off
