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6 December, 07:28

A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current? A. 2 A B. 3 A C. 1.75 A D. 1.33 A

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  1. 6 December, 07:34
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    First you calculate the total resistance. Since the resistors are connected in series, the total equivalent resistance is:

    Rtotal = R1 + R2 = 10 + 4 = 14 ohms

    Now you calculate the electrical current with Ohm's law:

    I = U/Rtotal = 42/14 = 3A

    Correct answer: B. 3 A
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