Solve Ohm’s law ( V = IR ) for each of the four elements in the circuit. a. What

Question

Solve Ohm’s law (V = IR) for each of the four elements in the circuit.

a. What is the relationship among the potential drops across each resistor when the resistors are in series? Compare to the potential rise of the power supply.

b. A series circuit is a circuit in which resistors are arranged in a chain, so the current only has one path to take. As a result, the current is the same through each resistor. What is the relationship for the current through each resistor when the resistors are in series? Compare to the current through the power supply.

c. Compare the total resistance experienced by the potential difference and current through the battery (i.e. the net resistance) to that for the three resistors when combined according to the rules in your textbook/lecture notes.

Explanation / Answer

(a)Potential drops across each resistor when the resistors are in series, is directly proportional to Current in the cricut.If there is a potenital rise of the power supply, then current would increase in the circut and so the Potential drop across each resistor would also increase.

(b)
Current through each resistor when the resistors are in series, I = V/Req
Where Req = R1 + R2 + R2
V is the Voltage of the power supply.
This will be the same current which will pass through power supply.

(c)
Total Resistance experienced by power supply, will be equal to Net resistance, Rnet = R1 + R2 + R3.

(d)
If Fourth Resistance is added, R4.

Voltage will remain same as battery is same.
Current will decrease in the circut, because
I = V/(R1+R2+R3+R4)

Power delivered by the power supply will decrease because, P = V*I , as current is decreasing.

For resistors,
Current through each resistor would decrese.
Potential drops across other resistors would also decrease as current would decrease in the circut.

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