All AP Physics 1 Resources
Example Questions
Example Question #1 :Ohm's Law
Consider the circuit:
If each resistor has a value of, how much current is flowing through the circuit?
First we need to calculate the equivalent resistance of the circuit using the following expression for condensing parallel resistors:
Now we can use Ohm's law to calculate the current flowing through the circuit:
Example Question #1 :Circuits
A light bulb requires 60 W to function properly. If it is connected to a powersupply of 120 A and functions properly, then what is the resitance of the light bulb?
First, identify the given information:
Two equations are required for this problem:
1.) Ohm's law,
2.) Electrical power
Using the equation for electrical power, we can rearrange to solve for:
At this point, we can substitute in the known values and determine the voltage:
Ohm's law can then be rearranged to solve for the resistence of the light bulb:
The known voltage value then can be substituted into Ohm's law to determine the resistance of the light bulb:
Example Question #1 :Circuits
What is the resistance of a resistor if the current going through it isand the voltage across it it is?
Use Ohm's law.
Plug in known values and solve for resistance.
Example Question #1 :Circuits
What is the voltage across a resistor with a resistance ofthat has a current ofgoing through it?
Use Ohm's Law.
Example Question #2 :Circuits
What is the current through a resistor if the resistor has a resistance ofand the voltage across the resistor is?
Use Ohm's law.
Example Question #1 :Circuits
If the current through aresistor is, what is the voltage across the resistor?
UseOhm's law.
Plug in known values and solve.
Example Question #7 :Ohm's Law
The voltage measured from a point betweenandto the ground is
What is the resistance of?
Begin by finding the total resistance in the circuit.
Now note that the voltage identified in the problem is the same as the voltage drop across the second resistor:
Now, sinceandcombine to form the total resistance:
Example Question #1 :Ohm's Law
, and the voltage measured from a point betweenandto the ground is
In the circuit above, what is the resistance of?
Begin by finding the total resistance in the circuit.
Now note that the voltage identified in the problem is the same as the voltage drop across the second resistor:
Example Question #1 :Ohm's Law
is composted of two resistors in parallel,and
is a singleresistor.
In the circuit above, what is the current?
To find the current, first find the total resistance of the circuit. Begin by simplifying, the two resistors in parallel as follows:
年代inceandare in series, their combined resistance is:
Use Ohm's law to find the current.
Example Question #1261 :Ap Physics 1
A resistor with a resistance ofhas a current flowing through it of 5A. What is the potential drop across the resistor?
Ohm's law states that the potential drop across a resistor is equal to the product of the current flowing through the resistor and the resistance of the resistor:
We were given the current, I, and the resistance, R, so we simply multiply the two together to get our final answer.
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