27. Resistors & DC Circuits

Which of the following terms best describes an electrical current ($I$)?

A circuit consists of a battery with emf $𝐸$ and two resistors, $R=2\Omega$ and $R=4\Omega$, connected in series. If the emf of the battery is $12V$, what is the current through the battery?

A wire delivers $12.0 C$ of charge in $4.0 s$. What is the current in the wire?

In a series $LC$ circuit, which of the following statements about the electric current is correct?

A simple circuit consists of a $12 V$ battery connected in series with a $4 \Omega$ resistor. What is the current in this circuit?

A total of $600C$ of charge passes through a flashlight in $0.500h$. What is the average current?

If the voltage across a circuit remains constant ($V=constant$), how does the current ($I$) change when the resistance ($R$) is doubled?

Which of the following best defines electric current?

Which of the following is the correct SI unit for electric current?

Which type of electric current is typically supplied to household wiring in most homes?

A current of $1.8A$ delivers a charge of $2.5C$. How much time was required?

A circuit consists of a $12 V$ battery connected in series with a $6 \Omega$ resistor. What is the current flowing through the resistor?

In the circuit shown, two batteries with emfs $e_1$ and $e_2$ are connected in series with resistors $R_1$ and $R_2$. If the current flowing through $e_2$ is $i_2$, what is its value?

Which of the following best describes the relationship between electric current $I$, charge $Q$, and time $t$ in a conductor?

Why must an electric circuit maintain a closed loop for current to flow?