Mehran University of Engineering and Technology, Jamshoro
Department of Telecommunication Engineering
Applied Physics (1st Semester, 1st Year)
______________________________________________________________________________
Name: _____________________________________ Roll Number: ____________________
Score: _____________ Signature: ________________________Date:____________________
LAB HANDOUT #02
OHM’S LAW VERIFICATION
OBJECTIVE: Verification of Ohm’s Law & determine the resistance of resistor
using:
(a) Ohms law and,
(b) Digital Multimeter.
EQUIPMENT & CIRCUIT COMPONENTS REQUIRED:
Breadboard
Digital Multimeter
DC Power Supply
Resistors with different ratings
Connecting wires
THEORY:
Method I: Calculating resistance through Ohm Meter or Digital Multimeter
An ohmmeter is an electrical instrument that measures electrical
resistance, the opposition to an electric current. Micro-
ohmmeters (microhmmeter or micro ohmmeter) make low
resistance measurements. Megohmmeters (aka mega ohmmeter
or in the case of a trademarked device Megger) measure large
values of resistance. The unit of measurement for resistance is
ohms (Ω).
Steps:
• Put one probe on one end of the resistor
• Put the other probe on the other end of the resistor
• Read the ohm meter scale
PROCEDURE:
You will be supplied with sets of 3 resistors.
1. Find the nominal value and the tolerance of each
resistance using the Resistor color code chart.
2. Using the digital multimeter as an Ammeter,
measure and record the current accross each
