2. Electricity

Electric Circuits Advanced — Quiz

Test your understanding of electric circuits advanced with 5 practice questions.

Practice Questions

Question 1

A power supply has an e.m.f. of $24 \text{ V}$ and an internal resistance of $2 \Omega$. It is connected to a variable external resistor. What is the maximum power that can be dissipated by the external resistor?

Question 2

In a potential divider circuit, if the resistance of one of the resistors is significantly increased, how does this affect the voltage across that resistor?

Question 3

A circuit contains a battery with an e.m.f. of $9 \text{ V}$ and an internal resistance of $0.8 \Omega$. If the terminal potential difference is measured as $7.5 \text{ V}$, what is the current flowing through the circuit?

Question 4

Which of the following best describes the function of a shunt resistor when used with an ammeter?

Question 5

A potential divider circuit is constructed using two resistors, $R_1$ and $R_2$, connected in series to a $12 \text{ V}$ supply. If $R_1 = 4 \Omega$ and the voltage across $R_2$ is $8 \text{ V}$, what is the resistance of $R_2$?