All AP Physics 2 Resources
Example Questions
Example Question #4 : Current And Voltage
Determine the current through .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law:
We also know that:
Substitute:
Solve for :
Plug in our values:
Example Question #4 : Current And Voltage
Determine the current through .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law:
We also know that:
Substitute:
Solve for :
Plug in our values:
.
Example Question #31 : Circuits
Determine the voltage drop across .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law:
We also know that:
Substitute:
Solve for :
We plug in our values.
Use Ohm's law:
Example Question #201 : Electricity And Magnetism
Determine the voltage drop across .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Using Ohm's law:
We also know that:
Substitute:
Solving for :
Plug in our values:
Use Ohm's law:
Example Question #11 : Current And Voltage
Determine the voltage drop across .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law:
We also know that:
Substitute:
Solve for :
Plug in our values, we get
Use:
Example Question #32 : Circuit Properties
Determine the voltage drop across .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law:
We also know that:
Substitute:
Solve for :
Plug in our values, we get
Use:
Example Question #851 : Ap Physics 2
Determine the voltage drop across .
First, we need to find the total resistance of the circuit. In order to find the total resistance of the circuit, we need to combine all of the parallel resistors first, then add them together as resistors in series.
Combine with :
Combine with :
Combine with :
Then, add the combined resistors, which are now all in series:
Then, we will need to use Ohm's law to determine the total current of the circuit.
Combine all of our voltage sources:
Plug in our values:
We know that the voltage drop across parallel resistors must be the same, so:
Use Ohm's law
We also know that:
Substitute:
Solve for :
Plug in our values, we get
Use
Example Question #852 : Ap Physics 2
Determine the voltage drop across
None of these
The first step is to find the total resistance of the circuit.
In order to find the total resistance of the circuit, it is required to combine all of the parallel resistors first, then add them together as resistors in series.
Combining with , with , with .
Then, combining with and :
Ohms is used law to determine the total current of the circuit
Combing all voltage sources for the total voltage.
Plugging in given values,
The voltage drop across parallel resistors must be the same, so:
Using ohms law:
It is also true that:
Using Subsitution
Solving for :
Plugging back into ohms law in order to find the voltage drop.
.
Example Question #31 : Circuits
identical resistors are placed in parallel. They are placed in a circuit with a battery. If the current through the battery is , determine the current through each resistor.
None of these
Since each resistor is in parallel, the voltage drop across each will be .
Since each resistor is identical, they all have the same resistance.
Using
and
It is determined that
Example Question #32 : Circuits
identical resistors are placed in parallel. They are placed in a circuit with a battery. If the current through the battery is , determine the resistance of each resistor.
None of these
Since each resistor is in parallel, the voltage drop across each will be .
Since each resistor is identical, they all have the same resistance.
Using
and
It is determined that
Using
for all three resistors
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