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    Resistor Circuit Practice Questions

    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880

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    Resistor Circuits

    Two 3.3 k resistors are in series and this series combination is in parallel with a 4.7 k resistor. The voltage across one of the 3.3 k resistors is 12 V. The voltage across the 4.7 k resistor is

    A. 24 V
    B. 12 V
    C. 0 V
    D. 6 V

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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880

    b. 1.389

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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880

    Series:R1 +R2 = 2.4 *10 ^3
    Parallel: Rt Series * R3/ Rt Series + R3 = 1.389 * 10 ^3
    Rt Parallel = 1.389 * 10 ^3

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    Kalbi_Rob is offline Experienced Member Pro Subscriber
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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880
    Rseries=1200 + 1200 = 2400
    Rtotal = (2400*3300)/(2400+3300) = 1389 ohms or 1.389 k

    https://makeabilitylab.github.io/phy...-parallel.html

    Quote Originally Posted by Vysakh9292 View Post
    Two 3.3 k resistors are in series and this series combination is in parallel with a 4.7 k resistor. The voltage across one of the 3.3 k resistors is 12 V. The voltage across the 4.7 k resistor is

    A. 24 V
    B. 12 V
    C. 0 V
    D. 6 V
    Since one 3.3k resistor is half the circuit of the 2 3.3k resistors in series, then the total voltage drop across both 3.3k ohm resistors is now 12*2 = 24V. Since 2 3.3k ohm resistors are in parallel with a 4.7k ohm resistor, and voltage is equal across parallel paths, then the voltage across the 4.7k ohm resistor is also 24V.

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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880
    1.389k Ohms

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  13. edgarenc is offline Junior Member Pro Subscriber
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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880
    5700
    2400x3300/2400+3300=
    7920000./5700.=1389

    1/2.4+1/3.3= .7196
    1/7196=1.389
    Last edited by edgarenc; 4 Weeks Ago at 11:38 AM. Reason: was wrong

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  15. cbmcbride is offline Junior Member Pro Subscriber
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    Quote Originally Posted by Vysakh9292 View Post
    Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

    A. 138
    B. 1,389
    C. 5,700
    D. 880
    The answer is B.
    The absolute best way to make this calculation is, (1/2.4+1/3.3)^-1 = 1.38947 in kOhms that is 1,389 ohms

    resistors in series ADD

    resistors in parallel inversely add.........................^^^^^^^^^......hence the whole equation to the ^-1

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