Download montgomery college - Prince Mohammad Bin Fahd University

Prince Mohammad Bin Fahd University
COEN 3421
Electronics I
Fall 2012
Yasmin Tauqeer Ansari
Name: Noof Al-sowidan
ID:200800579
Assignment #1
Pre-Requisite: You need to know what an ohm-meter is and how it works.
Q1. If you connect a diode being used in the Forward biased mode to an ohm-meter, what
reading will you observe on the meter?
forward biased diode measures about 1k ohms(+/-25%)
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Q2. If you connect a diode being used in the Reverse biased mode to an ohm-meter, what
reading will you observe on the meter?
reverse biased diode measures infinity (high resistance or open circuit)
why voltage in x axis and why not in y axis?
voltage is an independent variable (which we vary, x-coordinate), and thus must be the x-axis.
in fact> ohm's law states>
current (I) [is proportional to] potential difference (v) applied across the conductor
I=KV
Y=KX
thus I is on the Y-axis
if we plot (by ohm's law) I vs V graph, then reciprocal of slope I-V graphs = resistance
slope = dY/dx = K
reciprocal of slope = 1/K = X/Y = V/I = R = as mentioned originally by OHM
rest is the sliced-version so that 10th standard students do not get confused by slope or reciprocal of slope
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we can also plot V-I graph
but the V = K1 * I
slope = dV/dI = K1 = resistance
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