What happens when resistance increases?

What happens when resistance increases?

• A. Higher resistance means higher current.
• B. Higher resistance means lower current.
• C. Higher resistance means no current.
• D. Higher resistance means infinite current.

Answer: (B)

Current in a circuit is determined by Ohm’s law: I = V / R. With the same supply voltage, increasing resistance makes it harder for electrons to flow, so the current decreases. Doubling the resistance roughly halves the current, and as resistance becomes very large, the current approaches zero. In real systems, the source and protective devices also limit current, but the fundamental idea is that higher resistance reduces current.

Current in a circuit is determined by Ohm’s law: I = V / R. With the same supply voltage, increasing resistance makes it harder for electrons to flow, so the current decreases. Doubling the resistance roughly halves the current, and as resistance becomes very large, the current approaches zero. In real systems, the source and protective devices also limit current, but the fundamental idea is that higher resistance reduces current.