Part A: Consider the Circuit shown below.

Calculate the current, I, through the resistor, R$,$ assuming R$=6\mathrm{.}8$ Ohms. Be sure to select appropriate units for current $($A$,$mA$,$ or muA$).$

Repeat $($a$)$ assuming R$=4\mathrm{.}7$ kOhms.

Repeat $($a$)$ assuming R$=8\mathrm{.}1$ MOhms.

Part B: Use Ohm's Law and the Power Equation to answer the following questions.

If a refrigerator draws $2\mathrm{.}2$ A at $120$ V $,$ what is the resistance of the refrigerator?

A $9$ V dc battery can provide $45$ mA of current. What is the power rating of the battery?

The current through a $10$ kOhms resistor is $1\mathrm{.}5$ mA $.$ What is the power dissipated by the

resistor?

If the voltage across a resistor is doubled, what happens to the power dissipated by the resistor? Verify your answer by doing calculations.