MCAT Physical : Circuits

Study concepts, example questions & explanations for MCAT Physical

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Example Questions

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Example Question #2 : Resistivity

What is the current in a circuit with a  resistor followed by a  resistor that are both in parallel with a  resistor? The voltage supplied to the circuit is 5V.

Possible Answers:

Correct answer:

Explanation:

Resistors in serries add according to the formula:

Resistors in parallel add according to the formula:

We can find the total equivalent resistance:

Now we can use Ohm's law to find the current:

Solve: 

 

Example Question #1 : Ohm's Law

battery supplies power to a circuit with a current of . What is the resistance in this circuit?

Possible Answers:

Correct answer:

Explanation:

To find resistance from voltage and current, we will need to use Ohm's law:

We are given the voltage and current, allowing us to solve for the resistance.

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