Question: In a transistor, the base current is about_________of emitter current?

• 1. 25%
• 2. 20%
• 3. 35 %
• 4. 5%

Question: A transistor is a___________operated device?

• 1. current
• 2. voltage
• 3. both voltage and current
• 4. none of the above

Question: A transistor has____________?

• 1. one pn junction
• 2. two pn junctions
• 3. three pn junctions
• 4. four pn junctions

Question: The element that has the biggest size in a transistor is____________?

• 1. collector
• 2. base
• 3. emitter
• 4. collector-base-junction

Question: A 1,000 V power supply would use_____________ as a filter capacitor?

• 1. paper capacitor
• 2. air capacitor
• 3. mica capacitor
• 4. electrolytic capacitor

Question: If the PIV rating of a diode is exceeded,_______________?

• 1. the diode conducts poorly
• 2. the diode is destroyed
• 3. the diode behaves like a zener diode
• 4. none of the above

Question: The most widely used rectifier is ________________?

• 1. half-wave rectifier
• 2. centre-tap full-wave rectifier
• 3. bridge full-wave rectifier
• 4. none of the above

Question: The PIV rating of each diode in a bridge rectifier is ___________that of the equivalent center-tap rectifier?

• 1. one-half
• 2. the same as
• 3. twice
• 4. four times

Question: A 10 V power supply would use ____________ as filter capacitor?

• 1. paper capacitor
• 2. mica capacitor
• 3. electrolytic capacitor
• 4. air capacitor

Question: ____________ rectifier has the lowest forward resistance?

• 1. solid state
• 2. vacuum tube
• 3. gas tube
• 4. none of the above