week5Concepts.pdf - ConcepTest 26.1a Series Resistors I Assume that the voltage of the battery is 9 V and that the three resistors are identical What is

week5Concepts.pdf - ConcepTest 26.1a Series Resistors I...

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1 Page 1 ConcepTest 26.1a Series Resistors I 9 V Assume that the voltage of the battery is 9 V and that the three resistors are identical . What is the potential difference across each resistor? 1) 12 V 2) zero 3) 3 V 4) 4 V 5) you need to know the actual value of R Since the resistors are all equal , the voltage will drop evenly across the 3 resistors, with 1/3 of 9 V across each one. So we get a 3 V drop across each. ConcepTest 26.1a Series Resistors I 9 V Assume that the voltage of the battery is 9 V and that the three resistors are identical . What is the potential difference across each resistor? 1) 12 V 2) zero 3) 3 V 4) 4 V 5) you need to know the actual value of R Follow - up: What would be the potential difference if R = 1 W , 2 W , 3 W ? ConcepTest 26.1b Series Resistors II 12 V R 1 = 4 W R 2 = 2 W In the circuit below, what is the voltage across R 1 ? 1) 12 V 2) zero 3) 6 V 4) 8 V 5) 4 V ConcepTest 26.1b Series Resistors II 12 V R 1 = 4 W R 2 = 2 W In the circuit below, what is the voltage across R 1 ?
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