Resistor 3 Resistor 4 Resistor 5 OB ze the circuit in terms of Kirchhofrs Rale,

Question

Resistor 3 Resistor 4 Resistor 5 OB ze the circuit in terms of Kirchhofrs Rale, Q12: Use your experimental results to analyze t the four nodes, and determine Consider the net current flow into and out of cach o the junction rule is supported by your data. Determine the net voltage drop aWthe attention to your sign convention.) Kirchhoft's Rules to analyze this circuit? Can you analyze it using t three closed lops and determine whether or not your data supports the loop rule. d ar ley p ru (Pay close P013: Why do you think this y do you think this circuit is called a non-trivial" circuit? Did you Wi method? Ve Q14: Verify if Ohm's law is satisfied for at least three resistors and for the total resistan WRAPPING UP D. S: Under what conditions are Kirchhofr's Rules necessary to analyze a circuit? >Q16: Do you think that the resistance of a voltage probe is large or small Q17: Do you think that the resistance of a current probe is large or small? Why? Q18: Can you think of a mechanical analogy to resistance? Explain your analogy ? Why? PLEASE CLEAN UP YOUR AREAAND STRAICHTEN YOUR CHAIRS, SO THE STATION IS READY FOR THE NEXT STUDENTS TO USE IT

Explanation / Answer

15) Kirchoff's law can be used only for steady state circuits. For time varying circuits, there may be a charge uildup somewhere etc and it is invalid there. We need to analyse the circuit generally using Maxwell's equations.

16)voltage measuring meters are always in a parallel combinations with a wire. This is done to test the potential difference between two points.

Let's say we are measuring the voltage between the two sides of a resistor.If the probes have a low resistance, the current will go through the voltmeter than the circuit and it would seem to us that there is not much of a voltage drop. This should not happen. Most of the current(ideally all the current) should go through the resistor and the voltmeter should allow minimum (ideally no current) to pass through it and thus measure the voltage difference.

17) The current probe is a part of the circuit as a series combination. It needs to have all the current go through it without any resistance at all. If it's resistance is high, then it increases the total resistance of the circuit and decreases the total current, which is wrong. Hence, it's resistance is made very low should act as if it were not there at all.

18) If we consider water pipes, higher resistance pipes will have say clogs in certain areas.

Another example, sewer pipes may have various sieves/filters in them. The pipes with a lot of sieves will give a lot of resistance to the water flow. This is analogous to a wire having a lot of resistance.

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