Solve the variation problem.The voltage across a resistor is jointly proportional to the resistance of the resistor and the current flowing through the resistor. If the voltage across a resistor is 
for a resistor whose resistance is 
and when the current flowing through the resistor is 
find the voltage across a resistor whose resistance is 
-4.0px;" /> when the current flowing through the resistor is 
A. 54 volts
B. 56 volts
C. 42 volts
D. 48 volts
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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