What is the charge of a single electron?
A +1.6 × 10-19 C
B -1.6 × 10-19 C
C +1 C
D 0 C
What does an ammeter measure?
A Voltage
B Resistance
C Current
D Power
What is the reciprocal of resistance called?
A Voltage
B Conductance
C Inductance
D Capacitance
Which of the following is a property of an insulator?
A High conductivity
B Low resistance
C High resistance
D Free-flowing electrons
Which device is used to measure resistance?
A Ammeter
B Voltmeter
C Ohmmeter
D Wattmeter
What is the relationship between power, voltage, and resistance?
A P = V² / R
B P = R / V²
C P = VI
D P = IR
Which material is commonly used as a semiconductor?
A Copper
B Silicon
C Rubber
D Aluminum
What is the SI unit of electric field strength?
A Tesla
B Newton per coulomb
C Volt per ampere
D Ohm per meter
What does a diode do in a circuit?
A Stores energy
B Allows current in one direction
C Resists current flow
D Increases voltage
What type of current does a generator produce?
A Alternating Current (AC)
B Direct Current (DC)
C Both AC and DC
D Pulsating Current
What is the formula for calculating capacitance?
A C = Q / V
B C = V / Q
C C = V × Q
D C = V² / Q
What happens when an inductor is connected to an AC source?
A It resists the change in current.
B It blocks the current.
C It acts as a short circuit.
D It stores energy as charge.
What is the primary purpose of a transformer?
A To change the frequency of AC
B To increase or decrease voltage
C To convert AC to DC
D To store energy
What does the term “electric flux” refer to?
A The flow of electric current
B The total electric field passing through a surface
C The resistance of a conductor
D The potential energy in a circuit
What is the key principle behind solar cells?
A Electromagnetic induction
B Photoelectric effect
C Ohm’s law
D Magnetic flux