16. What is the symbol for a resistor in a circuit diagram?
a) Zigzag line
b) Straight line
c) Circle
d) Arrow
Answer: a) Zigzag line
17. Which type of circuit is used to convert AC power to DC power?
a) Rectifier circuit
b) Amplifier circuit
c) Oscillator circuit
d) Transformer circuit
Answer: a) Rectifier circuit
18. Which component is used to step up or step down voltage in an electrical circuit?
a) Inductor
b) Capacitor
c) Resistor
d) Transformer
Answer: d) Transformer
19. What does LED stand for?
a) Light Emitting Diode
b) Liquid Electrolyte Detector
c) Low Energy Device
d) Long Endurance Drive
Answer: a) Light Emitting Diode
20. What is the symbol for a capacitor in a circuit diagram?
a) Straight line
b) Zigzag line
c) Circle
d) Arrow
Answer: c) Circle
