Field effect transistor | FET | Third Year Practical Physics

Characteristic of FET and determination of mutual inductance, output resistance and voltage gain

Sample reading

Table for output characteristic

S.No.	VDS in volt		Drain current ID (mA) for
		VGS = 0 V	VGS = 0.5 V	VGS = 1 V
1	0	0	0	0
2	0.5	2.5	2.25	1.5
3	1	5.25	3.75	2.75
4	1.5	6.75	5	3.5
5	2	7.25	6	3.75
6	2.5	8.25	6.5	4.25
7	3	8.75	6.75	4.5
8	3.5	9.25	7	4.75
9	4	9.25	7	4.75
10	4.5	9.25	7	4.75

Table of mutual inductance

S.No.	VGS in volt		Drain current ID (mA) for
		VDS = 2.5 V	VDS = 5.5 V	VDS = 7.5 V
1	0.1	7.75	8.5	...
2	0.2	7.25	8.25	...
3	0.3	7.00	7.75	...
4	0.4	6.5	7.25	...
5	0.5	6.25	6.75	...
6	0.5	5.75	6.5	...
7	0.7	5.5	6.0	...
8	0.8	5.25	5.5	...
9	0.9	7.75	5.25	...
10	1.0	4.5	5	...
...	...	...	...	...

Note:

• Above readings are only for reference, students should perform the practical in their laboratory and get their own readings.