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March 28, 2017

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Could someone tell me how to start to solve this? Please

How much current flows in a 1000-ohm resistor when 1.5 volts are impressed across it?

  • Physics - ,

    Use ohm's law:
    voltage = current * resistance
    arranging for current: current = voltage / resistance

  • Physics - ,

    OK but what would the current be 150 watts? volts?

  • Physics - ,

    amps?

  • Physics - ,

    amps = volts / ohms
    = 1.5/1000 amps
    =0.0015 amps

  • Physics - ,

    The unit of currents is amps.

  • Physics - ,

    Ok but what is the answer how do i find the resistance? would it be .oo15 amps? this why i get so confused in this subject it all seems to run together.

  • Physics - ,

    Voltage is measured in volts, current is measured in amps, and resistance is measured in ohms. Ohms law says the relationship between these three items is:
    V = I * R
    where V = voltage in volts
    I = current in amps
    R = resistance in ohms

    The equation can be rearranged to find resistance or current.
    I = V / R
    R = V / I

    The problem gave two values, resistance and voltage. To find current, use the I = V / R equation.
    I = V / R
    I = (1.5 volts) / ( 1000 ohms)
    I = 0.0015 amps

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