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The two resistors in series have an effective resistance given by the formula

Reff = R1 + R2

therefore

Reff = 30 + 30 = 60 ohms

V = IReff

I = 40/60 = 2/3 (or 0.67) A

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Q: Calculate the current in a 40 V battery that powers a pair of 30 resistors connected in series?
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Three identical resistors each 45 ohms are connected in parallel across a 60-V battery The current through or drawn from the battery is?

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Related questions

Three identical resistors each 45 ohms are connected in parallel across a 60-V battery The current through or drawn from the battery is?

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How many amps will you get on a 9 volt battery with a 100 ohm resistor and a 100 ohm resistor and a 470 ohm resistor?

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What is the resistance in a circuit if two 60ohm's resistors are connected in series?

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