SAT II Physics : Electric Circuits
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Example Questions
Example Question #1 : Electricity And Magnetism
If a circuit contains a 
Ohm's law states:
Where 
We can substitute the given values from the question into the equation and solve:
Example Question #21 : Sat Subject Test In Physics
There are three resistors in parallel in a circuit with resistances of 
What is the equivalent resistance?
The equation for resistors in parallel is:
We are given the values of the resistors. Using this formula, we can solve for the equivalent resistance.
Plug in the given values and solve.
Example Question #22 : Sat Subject Test In Physics
A voltage of 
This question can be solved using Ohm's law:
We are given the voltage and the current. Using these values, we can solve for the resistance.
Example Question #2 : Electricity And Magnetism
A capacitor with capacitance 
Capacitance of a circuit is defined by the equation:
Where 
Since the metal plates are cut in half, the area is halved. We can substitute 
The result is that the capacitance is half the original quantity.
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