DC Circuits

What is the relationship between voltage, current, and resistance as described by Ohm's Law?

A circuit has a voltage of 9V and a resistance of 3 $\Omega$. What is the current?

A battery with an internal resistance of 1 $\Omega$ is connected to a 5-$\Omega$ resistor. If the battery's emf is 12V, what is the actual voltage across the 5-$\Omega$ resistor?

What is the same in all parts of a series circuit?

Two resistors, 4 $\Omega$ and 6 $\Omega$, are in series with a 12V battery. What is the total current in the circuit?

Three resistors, 2 $\Omega$, 4 $\Omega$, and 6 $\Omega$, are in series with a battery. If the power dissipated by the 4-$\Omega$ resistor is 16W, what is the voltage of the battery?

What is the same across all components in a parallel circuit?

Two resistors, 10 $\Omega$ and 20 $\Omega$, are in parallel with a 10V source. What is the total current supplied by the source?

A 5-$\Omega$ and a 10-$\Omega$ resistor are connected in parallel. This combination is then connected in series with a 2-$\Omega$ resistor and a 12V battery. Find the current through the 5-$\Omega$ resistor.

If the voltage across a resistor is doubled, what happens to the power dissipated by the resistor?