Activity 2: Measuring Voltages and Currents within Series Circuits 1. Connect th

Question

Activity 2: Measuring Voltages and Currents within Series Circuits 1. Connect the series combination of the three to the D-cell battery. Note which end is 2. Set the Multimeter to measure de voltage on an appropriate range of sensitivity. Measure the connected to the negative and which is connected to the positive terminal:s. voltages across the individual resistors and then across the combinations of resistors. careful to observe the polarity of the leads (red is +, black is -). Record your readings below (The values of the can be used from the measurements you made in Activity 1.) Vi 0.3SD V =I.lov R3 R12 V12 V23 R23 V123 R123 = 14231 v123 = li Sov Figure 4.2 Series Project 2: Resistors in Parallel Activity 1: Equivalent resistance ARALLEL combinations of resistors, first using two resistors at a time to 1. Construct P CompR, and Ri3, and then using all three for R123. Measure and record the

Explanation / Answer

1)Voltage drop across a resistor is given by:

V = i R

since the same current flows throrugh the resistors connected in series, the drop across resistors gets maximised with the value of resistance.

In our table also, we see that more the resistance value, more is the drop across that resistor.

It should coincide with Khirchoffs loop rule[for more explanation, Voltage of battery is needed]

2)As stated in (1)the voltage is directly proportional to the resistor value, since in series combination of resistor, same current flows through all the resistors.

So, more the resistance of a resistor, more is the voltage.

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