When a voltage of 200 V is applied across a circuit, the resulting current is 5 A. When the voltage is increased to 300 V, the resulting current is 7.5A. Does the circuit probably obey Ohm's Law?
A) Yes, because the ratio of voltage to current remains constant for a change in voltage
B) No, because a change in voltage results in a different value of current

Question

Quizplus · Accepted Answer

The circuit likely obeys Ohm's Law because the ratio of voltage to current (V/I) remains constant (200V/5A = 40Ω and 300V/7.5A = 40Ω), indicating a linear relationship between voltage and current, which is a hallmark of Ohm's Law.

When a Voltage of 200 V Is Applied Across a Circuit