If four parallel 10 $\mathrm { k } \Omega$ resistors are in series with a single 20 $\mathrm { k } \Omega$ resistor and one of the parallel resistors shorts, the voltage across the other parallel resistors________
A) decreases
B) remains the same
C) increases

Question

Quizplus · Accepted Answer

When a resistor in parallel shorts, the effective resistance of the parallel combination decreases. This causes the total resistance of the circuit to decrease, which leads to an increase in current flowing through the circuit. According to Ohm's law, voltage is directly proportional to current when resistance is constant, so an increase in current leads to an increase in voltage across the parallel resistors. Therefore, the correct answer is (A) the voltage across the other parallel resistors decreases.

If Four Parallel 10 kΩ\mathrm { k } \OmegakΩ Resistors Are in Series with a Single 20

If Four Parallel 10 $\mathrm { k } \Omega$ Resistors Are in Series with a Single 20