Quiz Questions

1. Diodes and transistors are both made of

semiconductors
germanium
cathodes
transducers

2. The three parts of a transistor are the

anode, cathode, base
base, emitter, collector
diode, base, valve
anode, cathode, emitter

3. A current is used for most electronic systems, while B current is easier to transport over long distances.

A=alternating, B=direct
A=alternating, B=smooth
A=direct, B=transformer
A=direct, B=alternating

4. Here is a transistor system that turns on a sprinkler when a greenhouse gets too dry:

A gardener changes the sprinkler component to a dehumidifier. What else should be done if this same circuit were to be used to activate a dehumidifier for when the greenhouse gets too humid?

Change the emitter and the base of the transistor
Switch the variable resistor and the moisture detector
Place a resistor whose resistance increases with humidity in place of the variable resistor
Nothing at all

5. In this transistor, the VBE, the base-emitter voltage, is equal to 0.7 V. Find the base current

2.47 mA
2.50 mA
2.54 mA
2.50 A

6. If hFE, the current gain is equal to 150, and the base current is 2.50 mA, find the emitter current.

0.375 A
60.0 A
0.378 A
62.5 A

7. If the collector current in this circuit is 0.35 Amps, find the VCE, the collector-emitter voltage.

15 V
43 V
65 V
83 V

8. All logic circuits can be made out of

AND gates
OR gates
NOT gates
NAND gates

9. If these combinations of inputs are passed through a NOR Gate, then a NOT Gate, what will be their outputs?

Input X : 0 0 1 1
Input Y : 0 1 0 1

0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1

10. A flashlight’s circuit has a battery (10 V), a lightbulb, and a small resistor connected in series in it. If the small resistor has a voltage of 0.5 V across it, find the ratio of the lightbulb’s resistance to its own

9
9.5
19
21

Sorry, the check button is no longer functional.