Which of the following materials is a good conductor of electricity?
A Rubber
B Glass
C Wood
D Copper
What is the SI unit of electric charge?
A Coulomb
B Ohm
C Volt
D Ampere
What does the power formula P=V×I calculate?
A Resistance
B Voltage
C Power
D Current
What does a circuit breaker do?
A Store energy
B Break the circuit
C Control current
D Measure voltage
Which of these components is used to store electrical energy?
A Transistor
B Inductor
C Resistor
D Capacitor
What does Ohm’s Law state?
A Current is proportional to voltage
B Current equals resistance divided by voltage
C Voltage equals current times resistance
D Voltage is inversely proportional to resistance
What does a diode do in a circuit?
A Converts AC to DC
B Reduces resistance
C Stores energy
D Increases current
What is the purpose of a fuse in an electrical circuit?
A To measure current
B To store charge
C To break the circuit under overload
D To increase voltage
What is an electric field?
A A property of conductors
B A force between two charges
C A flow of electric current
D A region with no charge
Which of these is an example of a renewable energy source?
A Nuclear
B Coal
C Solar
D Natural gas
What does Kirchhoff’s Voltage Law (KVL) state?
A Total voltage in a loop is zero
B Voltage is the same at all points
C Power is conserved in circuits
D Current is conserved at junctions
What is the SI unit of resistance?
A Volt
B Watt
C Ampere
D Ohm
What is a magnetic field created by?
A Electrons at rest
B Magnetic materials
C Moving electric charge
D Static electric charge
Which of these is an example of an insulator?
A Aluminum
B Wood
C Copper
D Iron
What does the electric potential energy of a charge depend on?
A The distance from a charge
B The charge’s mass
C The type of conductor
D The charge’s velocity