Solve.
-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 21 volts for a resistor whose resistance is 3 ohms and when
The current flowing through the resistor is 7 amperes, find the voltage across a resistor whose resistance is
2 ohms and when the current flowing through the resistor is 4 amperes.
A) 12 volts
B) 28 volts
C) 8 volts
D) 14 volts

Question

Quizplus · Accepted Answer

The relationship between voltage (V), resistance (R), and current (I) is given by Ohm's Law, V = IR. For the first scenario, V = 21 volts, R = 3 ohms, and I = 7 amperes. This is consistent with Ohm's Law. For the second scenario, to find the voltage across a resistor with R = 2 ohms and I = 4 amperes, we use the same formula: V = IR = 2 ohms * 4 amperes = 8 volts.

Solve. -The Voltage Across a Resistor Is Jointly Proportional to the the Resistance