Automatic Night Light Quizziz

What are the three legs of a transistor? (Select all that apply)

• Collector

• Base

• Gate

• Emitter

How many rings are on a resistor's colour code?

• 3

• 4

• 5

• 2

In our circuit diagram (see image above), we place the LDR parallel to the LED. Which is true? (SELECT ALL)

• The darker the room, the more current flow in the LED

• The lighter the room, the less current flow in the LED

• The darker the room, the less current flow in the LED

• The lighter the room, the more current flow in the LED

Select all electrical components which have semiconductors.

• Transistors

• LEDs

• Diodes

• Resistors

What is an anode / cathode respectively?

• + / -

• - / +

When does a short circuit occur? (Select all)

• When immense current passes through a circuit

• When there is little to no resistance through a circuit

• When there is too much voltage in a circuit

• When a circuit is just a resistor

Select the correct doping levels for an Emitter, Base, and Collector respectively.

• heavily doped, lightly doped, moderately doped

• lightly doped, not doped, moderately doped

• moderately doped, heavily does, lightly doped

• lightly doped, moderately doped, heavily doped

Analyze the circuit. Where is the voltage divider?

• On the left (9V battery)

• Middle (LDR portion)

• On the right (Resistor portion)

• On the right (NPN transistor)

What are the differences between an NPN and PNP transistors?

• One is a Bipolar Junction Transistor, the other is not

• Voltage is applied to different terminals for each

• Current flows in different directions

• They use different semiconductor materials