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Anonymous asked in Education & ReferenceHomework Help · 1 decade ago

Science related math question / math related science question?

PLease give me the answer and show all work!! or at least give me he FoRmulA?!

1) Find the current flowing through a 20- ohms wire connected to a 12 volt battery. WHat if it were conected to a 6 volt battery?

2) Calculate the potential difference across a 25 ohms resistor if a .3 amperes current is flowing through it?

4 Answers

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  • N H L
    Lv 4
    1 decade ago
    Favorite Answer

    The formula you're looking for is V = Ix R where V is the voltage, or potential difference, I is the current, and R is the resistance, measured in Ohms.

    1. You're looking for current, so the formula becomes I = V/R.

    I = V / R

    I = 12 / 20

    I = 3/5, or 0.6 amps

    If the potential difference were smaller, the current would be smaller. The proof?

    I = V / R

    I = 6 / 20

    I = 3 / 10 or 0.3 amps

    Same thing for #2:

    V = IR

    V = 0.3 amps x 25 ohms

    V = 7.5 volts

    Hope that helps!

  • Anonymous
    1 decade ago

    Ohms law = I * R = E

    I = Current

    R = Resistance

    E = current.

    Plug and crunch.

  • GSW_FTW
    1 decade ago

    V=IR

    V is voltage, I is current, R is the resistance in Ohms.

  • Anonymous
    1 decade ago

    E=Mc squared. 3=mbn9= mc over lmb

    Got it?

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