KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
ELECTRICAL ENGINEERING DEPARTMENT
EE204: Fundamentals of Electric Circuits LAB
LAB Instructor: Motaz Al Farraj
Pre-LAB (out of 10):
Report (out of 10):
Serial Number:
Experiment 2: Resistors and Ohm’s Law
Name: _______________________________________________ ID#: __ __ __ __ __ __ __ __ __ __
The Messenger of Allah, peace be upon him, said:
"Allah makes the way to Jannah easy for him who treads the path in search of knowledge.''
Pre-LAB assignment:
Calculate V1, I1 and the power dissipated by the resistor for the following circuit.
Analysis:
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Value
V1
I1
Power
1
Unit
LAB report:
Resistor
R1
R2
R3
Nominal Value/ Tolerance
Ohmmeter reading
V/I
% Deviation from
nominal value
Ohmmeter
V/I
Are the values within tolerance? (Yes/No)
Table 1. Resistors values
V (Volts)
6
10
15
I (mA)
R (Ω)= V/I
P (Watt)= IV
Table 2. Power Rating ( R=470Ω, 1W)
Q1: Plot the resistance as a function of the power in Figure 1 below:
Figure 1. A plot of the Resistance as a function of Power
2
20
Q2: Does the resistor in step 4 operate in the linear region or non-linear region? Explain by
considering the power rating of the resistor.
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Q3: You have an electric heater that takes 4 kW from a voltage source of 220 V. Calculate the
resistance of that heater.
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Q4: If the current in a resistor doubles, what happens to the dissipated power? (Assume the
resistor operates in the linear region). Support your answer mathematically.
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Q5: A 2 Ω resistor is needed to be used in circuit where the voltage across the resistor is 1.5 V .If
two 2 Ω resistors with 1 W and 2 W power rating are available, as an engineer, which will you
recommend to use and why?
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