What does Kirchhoff’s Current Law state?
A Resistance is constant
B Current is conserved
C Voltage is constant
D Power is conserved
What is the SI unit of electrical energy?
A Joule
B Volt
C Ampere
D Watt
What does the power formula P=I²R calculate?
A Resistance
B Voltage
C Power
D Current
What happens to current when resistance is doubled while keeping voltage constant?
A Quadruples
B Doubles
C Stays the same
D Halves
What does the formula P=V²/R calculate?
A Resistance
B Power
C Voltage
D Current
What is the unit of electric charge?
A Watt
B Volt
C Coulomb
D Ampere
Which of the following is a property of resistors in a circuit?
A Limit current flow
B Measure current
C Increase voltage
D Store energy
What does a transformer do?
A Increase current
B Change voltage
C Increase resistance
D Store energy
What is the function of a diode in an electrical circuit?
A Convert energy to light
B Allow current flow in one direction
C Measure resistance
D Store energy
What is the purpose of an electrical capacitor?
A Store energy
B Block current
C Store voltage
D Measure current
Which material is a good conductor of electricity?
A Plastic
B Wood
C Copper
D Rubber
What is the function of a circuit breaker?
A Increase current flow
B Break the circuit in case of overload
C Measure voltage
D Store energy
What does an inductor do in a circuit?
A Convert energy to light
B Store current
C Measure resistance
D Store energy in a magnetic field
What is the primary function of a voltage source in a circuit?
A Store energy
B Limit current
C Provide voltage to the circuit
D Control current flow
What happens to the total resistance in a series circuit?
A It increases
B It decreases
C It remains constant
D It fluctuates