Consider the one-loop circuit with a bulb and a power supply. If you did not do

Question

Consider the one-loop circuit with a bulb and a power supply. If you did not do an experiment with this circuit, make predictions of the following and give reasons for your predictions: A comparison of the current before and after the bulb. A comparison of the current before and after the power supply. A comparison of the voltage across the bulb and the voltage across the power supply. Any relationship among the following four voltages: across the bulb, across the wire from the bulb to the power supply, across the power supply, and across the wire from the power supply to the bulb.

Explanation / Answer

a.) current remain same before and after bulb because total current in circuit remains consstant iin the circuit.

b.) it also remains same, current remains same throught the circuit.

c.)volatge cross bulb or volatge across battery will be same if the power source is ideal having no internal resistance, and the wire also doenot have resistance otherwise the voltage across bulb will be less as compare to power source because some voltage will be drop by wire and power source.

d.)across the power supply = V

across the wire from power supply to the bulb = V -IR1

across the bulb = V-IR1-IR2

across the wire from bulb to power supply = V- IR1-IR2-IR3

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