March 26, 2017

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A series combination of two resistors of resistance 12 Ù and 8 Ù is connected across a source of emf 24 V. What is the potential difference across 8 Ù resistors?

Do you know the formula for this?

  • Physics - ,

    Yes, I know the formula. It is called Ohm's Law.

    Why do you write "8 Ohm resistors" if there is only one of them?

  • Physics - ,

    That's my point, this is the exact question and i don't understand it. I didn't write 8 ohm resistors, my book did. Do you understand what they're asking?


  • Physics - ,

    There are four possible answers:


  • Physics - ,

    I=U/(R1+R2) =2.4/(12+8) =1.2 A,
    U1= I•R1= 1.2•8 = 9.6 V,
    U2= I •R2=1.2•12=14.4 V.

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