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Faculty of EngineeringDepartment

Of

Electrical & Electronic Engineering

EEE 3100

Electrical & Electronic Technology

Lab 9: Verification of Ohms Law on Diode

NAME: NOOR SUHAIDA GALIPMATRIC NO: 140007

LECTURER: PN RIBHAN ZAFIRA ABDUL RAHMAN

TABLE OF CONTENTS

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Contents

Page

Objectives

3

Equipments and Components 3

Results and Calculation 4

Discussion 7

Conclusion

8

Reference

9

2

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LAB 9 : VERIFICATION OF OHMS LAW ON DIODE

OBJECTIVES:

1. To verify Ohms Law on Diode

EQUIPMENTS AND COMPONENTS:

1. Multimeter

2. DC Voltage Supply

3. Breadboard

4. Resistor: 1 k

5. Diode NI 4001

6. Crocodile clips

7. Connecting wires

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RESULTS AND CALCULATION:

a) FORWARD-BIAS DIODE

FIGURE 9.6

E (V) Vmeasured (V) Imeasured (mA) R diode ()

0.2 0.180 0.0002 900000

0.4 0.383 0.031 12354.84

0.6 0.465 0.175 2657.140.7 0.480 0.240 2000.00

0.8 0.500 0.331 1510.57

1.0 0.521 0.469 1110.87

1.5 0.551 0.869 634.06

2.0 0.575 1.330 432.33

2.5 0.591 1.770 333.903.0 0.601 2.410 249.38

3.5 0.611 2.960 206.42

4.0 0.620 3.500 177.14

4.5 0.625 3.920 159.44

5.0 0.630 4.370 144.16

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Table 1: Experimental Result For Voltage (V), Current (I) and R for

Forward- Bias Diode

Graph V versus I

0

1

2

3

4

5

Voltage, V (V)

Current,I(mA)

Figure 1: Graph Vmeasured versus Imeasured

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b) REVERSE-BIAS DIODE

FIGURE 9

E (V) Vmeasured (V) Imeasured (mA) R diode ()0.2 0.182 0

0.4 0.467 0 0.6 0.657 0 0.7 0.768 0

0.8 0.868 0

1.0 1.017 0

1.5 1.569 0 2.0 2.030 0

2.5 2.580 0

Table 2: Experimental Result For Voltage (V), Current (I) and R for

Reserve - Bias Diode

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Graph Voltage, V (V) versus Current, I (mA)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Volateg, V (V)

Current,I(

Figure 2: Graph Vmeasured versus Imeasured

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DISCUSSIONS:

1. Based on the results that obtained from the experiment, it shows in

reverse-bias diode the value of resistor is infinity because of the

current is equal to zero.

2. This relationship obeys the Ohms Law which state that V = IR.

3. Current in circuit are equal to zero because of the current are going

into one direction only because of the properties of the diode that

not allowed it.

4. A p-n junction is a junction formed by combining P-type and N-type

semiconductors together in very close contact.

5. Forward-bias occurs when the P-type semiconductor material is

connected to the positive terminal of a battery and the N-type

semiconductor material is connected to the negative terminal.

8. Connecting the P-type region to the negative terminal of the batteryand the N-type region to thepositive terminal produces the reverse-

bias effect.

8

http://www.answers.com/topic/n-type-siliconhttp://www.answers.com/topic/n-type-semiconductor-2http://www.answers.com/topic/semiconductorhttp://en.wikipedia.org/wiki/Image:PN_Junction_in_Forward_Bias.pnghttp://www.answers.com/topic/n-type-siliconhttp://www.answers.com/topic/n-type-siliconhttp://www.answers.com/topic/n-type-semiconductor-2http://www.answers.com/topic/n-type-semiconductor-2http://www.answers.com/topic/n-type-semiconductor-2http://www.answers.com/topic/semiconductorhttp://www.answers.com/topic/semiconductorhttp://www.answers.com/topic/semiconductorhttp://www.answers.com/topic/n-type-silicon

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CONCLUSION:

As a conclusion, by using Ohms Law we can measured anddetermined the value of current, voltage and resistor on diode. The

forward-bias and the reverse-bias properties of the p-n junction imply

that it can be used as a diode. A p-n junction diode allows electric

charges to flow in one direction, but not in the opposite direction;

negative charges (electrons) can easily flow through the junction from

n to p but not from p to n and the reverse is true for holes.

REFERENCES:

Rizzoni, G., Principles and Applications of Electrical Engineering,

McGraw Hill.

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http://www.answers.com/topic/diodehttp://en.wikipedia.org/wiki/Image:PN_Junction_in_Reverse_Bias.pnghttp://www.answers.com/topic/diodehttp://www.answers.com/topic/diodehttp://www.answers.com/topic/diode

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Floyd, Electronic Fundamentals: Circuits, Devices, and

Appications, Pearson.

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