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.

d. If a fourth resistor were added in series with the other three, what would happen to the total voltage, current and power delivered by the power supply? What would happen to the potential drops across and currents through the other resistors?

Explanation / Answer

a)

when the resistors connected in series, current through each resistor is same.

so,

the ratio of potentail diffrence across them,

V1 : V2 : V3 : .... = R1 : R2 : R3 : .....

b) current through each resisotr is same.

c)

In series combibation,
Rnet = R1 + R2 + R3

d) Total voltage does not change.

power delivered by the power supply decreases.

because, P_delivered = V^2/Rnet

potential drop across each resistor and current through each resistor decreases.

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