SOLUTION: in a series circuit, the voltage drop across a resistor is directly proportional to the resistance. if the voltage drops across a 75 ohm resistance is 10 volts, what is the voltage

Algebra ->  Test -> SOLUTION: in a series circuit, the voltage drop across a resistor is directly proportional to the resistance. if the voltage drops across a 75 ohm resistance is 10 volts, what is the voltage      Log On


   

Question 670170: in a series circuit, the voltage drop across a resistor is directly proportional to the resistance. if the voltage drops across a 75 ohm resistance is 10 volts, what is the voltage drop across a 30 ohm resistor?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
in a series circuit, the voltage drop across a resistor is directly proportional to the resistance. if the voltage drops across a 75 ohm resistance is 10 volts, what is the voltage drop across a 30 ohm resistor?
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v = k*r
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Solve for "k" using "the voltage drops across a 75 ohm resistance is 10 volts"
10 = k*75
k = 2/15
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Equation:
v = (2/15)*r
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What is the voltage drop across a 30 ohm resistor?
v = (2/15)*30
v = 4 volts drop
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Cheers,
Stan H.