What do you predict would happen to the brightness of the bulbs if you connected a second battery in series with the first at. In this experiment you will learn to use the multimeter to measure voltage, current and resistance. Lets say, for example, that we have a circuit with the potential of 1 volt, a current of 1 amp, and resistance of 1 ohm. Accumulator or battery eliminator, ammeter, voltmeter, rheostat, coil. To use a voltmeter to read the voltage of your power supply. In this experiment you will verify ohms law in several different circuits using a.
The flow of charge is described as an electric current and we would like to explore how the. It relates the current flowing through any resistor to the voltage applied to its ends. Where v voltage in volts i current in amps r resistance in ohms this is called ohms law. Volts v water pressure current a measure of the flow of charge in a circuit. Determine the nominal resistance for the three resistors. Ohms law experiment steps to perform ohm s law experiment.
This video explains how to determine the resistance per cm of a given wire by plotting a graph of potential difference versus current. Combining the elements of voltage, current, and resistance, ohm developed the formula. When the green power button is pushed in, the power supply is on. Experiment 3 ohms law, measurement of voltage, current. For this experiment current controls need to be turned completely counterclockwise we will later adjust the current to 1a. Amperes a amount of water flowing resistance a measure of how difficult it is for current to flow in a circuit. Measure the actual resistance, r, of the three resistors using the ohmmeter and record them in the table provided. Become familiar with the use of a digital voltmeter and a digital ammeter to measure dc voltage and current.
Experiment 3 ohms law, measurement of voltage, current and resistance. A voltmeter is connected to the resistor for measuring the amount. Therefore, if we express v in volts, i in amperes, and r in ohms, then the basic. Your lab report for this experiment should contain the following sections. A variable dc power supply or vdc has a circular knob which can be rotated. We were exploring the properties of ohms law by manipulating the resistance and measuring. Ohms law is the fundamental law of electrical engineering. Ohm s law states that the current in amperes is equal to the voltage in volts divided by the resistance in ohms. Experiment 18 222 ohms law wanyi wu wendy 0105683 partner. Ohm s law ohm determined that if voltage is increased across a resistance, more current will. View lab report lab report 18 ohm s law from phys 221 at university of mississippi. Hence in the graph of v against i given above, the slope of the graph is the resistance. Lab report 18 ohms law experiment 18222 ohms law wanyi. Ohms law and kirchhoffs circuit rules 73 july prediction 11.
Ohm s law v r i is similar to equation of lines of the form y m x and we know that m is the slope of the line y m x. Bread board, variable dc power supply, resistors 15k. Ohm s law and the definition of resistance article pdf available in physics education 154. Experiment 2 ohm s law print 1 copy of the report page to start your lab report print 2 copies of the data page file object. A measure of how difficult it is for water to flow in a pipe.
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