How does increasing resistance affect current in a circuit?

• A. It increases the current.
• B. It has no effect on the current.
• C. It decreases the current.
• D. It doubles the current.

Answer: (C)

Increasing resistance in a circuit has a direct influence on the current flowing through it, as defined by Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), or I = V/R. When the resistance in a circuit increases while the voltage remains constant, the current must decrease. This is because the increased resistance offers more opposition to the flow of electrons, thereby reducing the number of electrons that can flow through the circuit. Consequently, the correct response indicates that as resistance increases, the current will decrease, highlighting the inverse relationship between these two variables in electrical circuits.