nd how resistors in series behave Determin stance in this type of circuit Goo Un
ID: 2306193 • Letter: N
Question
nd how resistors in series behave Determin stance in this type of circuit Goo Understand Ohm's Law: V R Equivalent series resistance: RE RR where V is voltage, I is current, and R is re uivalent resistance objective 1. Determine the equivalent resistance of two Procedure: Set up a simple circuit with a power s the first resistance and R2 is the equivalenow supply and a two resistance boxes in serier (There should only be one loop in this circuit.) Using an measure current. Using a voltmeter across both each resistance resulting change in current. Repeat with three othe an ammeter as part of the circuit loop to boxes in boxes to measure voltage. Set lue. Change the voltage on the power supply and record the in the spreadsheet program, Excel (or any other graphing or e this program to create a graph of current on the horzo unction, "slope", in Excel to determine the slope of the voltage on the vertical axis. Use the curve. Use the function, "intercept, to determine the y-int rizontal axis and ercept. ine) relationship such as Ohm's Law, the graph should show a cunve form ula, y # m x + b where y isthe vertical variable, x is the horizontal ollowing the math ble, m is the slope, and b is the y-intercept. The slope of the graph is simply rise dhvided by un. that is, the change in the vertical range divided by the change in horizontal range. For this e, the slope is the equivalent resistance. In this case the y-intercept should be zero. objective Calculate the precision of the equivalent resistance measurement as measured using the slope Use middle values for the current and voltage. Assume this is the same precision you get measuring one resistor and calculate the precision of the resistance using the series equivalent resistance equation. Compare the measured equivalent resistance and its precision to the calculated equivalent resistance and it precision. Objective 2. Determine voltage across individual resistors and their series combination. You can do this objective at the same time you are doing objective 1 Use the same setup as you did in Objective 1. Because there is one loop the current is the same in all the components and there is no need to move the ammeter. As you change the voltage in the circuit, measure the voltage across across the combination. well as each individual resistor as ual resistors. Compare this value to the Analysis: Add the voltage across each of the two individ voltage measured across the combination. Do this for each input voltage. Page 1Explanation / Answer
1. You didn't give me the experimental data..so I can't say the actual ans,but according to the experiment if you correctly done your experiment then the graph will be straight line passung through the origin. And from the slope you will easily calculate the value of the resistance.
Slope= Resistance = delta V / delta I
2. According to the theory the straight line curve will pass through the origin. So the Y position will be on Zero.
3. For series connection the equivalent resistance
R= R1+R2+ ....
And current, I = (V/R)
4. If you replace one resistance by a wire,then nothing will change just current will increase and the voltage will decrease. The graph will look like similar just the value of the slope will decrease.
5. If you do not replace with a wire then the circuit will open and no current will flow through the circuit and we will not get any output.
6. The sum of the voltages across the each resistance is nearly same to the input voltage. Becuse in series connection the voltage is devided across the resistors. Then if we make a sum of all the devided voltages then we will get the original voltage.
7. Yeah there is some internal resistance of the circuit because of the wires..but the internal resistance is very negligible compare to the external resistance that's why we usually neglect the internal resistances. But if we take the internal resistance then we have to add the internal resistance with the external resistance value.
7. Any switch that controls only a single instruments like bulb. Then the connection between the switch and the bulb is in series.
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