Ohm’s Law Coursework Example

Lab Report: Ohm’s Law Name Institution Affiliation Introduction Ohm’s law is a fundamental principle in electrical engineering as it relates the voltage applied to the ends of a resistor and the current that flows through the resistor. The law dictates that the electric potential difference across an ideal conductor relates directly to the current that flows through the conductor that is V∝A whereby V is the electric potential, and A is the current. Thus, the equation can be expressed as V=RA whereby R is a proportionality constant known as resistance. On the other hand, the power lost through the conductors is given by P(Watts)=I2R=V2R. Materials that obey Ohm's law are known as Ohmic materials while electric components made from the ohmic materials are known as resistors. In an experiment to determine ohm’s law, voltmeters and ammeters are used to measure voltage drop and current respectively while the resistors serve as the ideal conductor. Objectives To verify ohms To determine the power dissipated by resistors To connect and use variable resistors when verifying ohm’s law To familiarize with different circuit connections as well as connect, use, and read ammeters. To determine the behavior of the electrical voltage and corresponding current for a simple resistor and a standard tungsten-filament light bulb Materials 1 each power supply 2 each digital multi-meter (DMM) 1 each small circuit experiment board 6 each electrical lead cables 1 each rheostat Hypothesis The potential difference across a resistor relates directly to the current that flows through it. Exercise 1: Measuring the Current and Voltage for a Nominal 100 Ω Resistor In this exercise, the current and the voltage through a known resistor were measured. The current through the circuit was varied using a rheostat while the voltage remained constant. Procedure The power supply was set at 5.0 V. The rheostat's maximum resistance was set by moving the slide such t...