This document contains instructions for building a simple circuit with a variable resistor and light to observe changes in resistance. It also asks homework questions about the parts and uses of transistors, types of transistors, diacs, triacs, intrinsic standoff ratio, thyristors, and some examples of thyristor symbols.

1. Worksheet
Make this circuit below, and see how the light well change by variable
resistor:
Solution:
Here we see the resistor, and light.

2. Homework
1. What is the parties of transistor ?
2.What the transistor use for?
 As switch.
 For safe circuits.
 Control the volte.
3.Write some types of transistor?
 By data sheet.
 By multimeter.
1.What is theDiac?
2.What is the Triac?
3.WriteTriac Applications?

3. 4.What is intrinsic standoff ratio, and the period of the
circuit?
1.What is the thyrestor?
2.writeSome thyristors and their symbols?