What is the effect of high resistance on current?

• A. It increases the current.
• B. It has no effect on the current.
• C. It hinders the current more.
• D. It causes current to oscillate.

Answer: (C)

The key idea is how current responds to resistance when the voltage is fixed. According to Ohm’s law, I = V / R. This means current is inversely proportional to resistance: as resistance goes up, current goes down. When resistance increases, it offers more opposition to the flow of charges, so fewer charges pass per second.

For example, with a constant supply, doubling the resistance roughly halves the current. If resistance becomes very high, the current becomes very small, effectively limiting the circuit’s operation.

The other statements don’t fit because increasing resistance does not raise current, there is usually a measurable current as long as there’s a closed path and some voltage, and resistance alone doesn’t cause oscillations—oscillations require reactive components or a varying source.