Question

You're given a cell with a resistance R. You then decrease its resistance. Based on your knowledge of the LIF model (and RC circuits), select all of the correct statements below:

The time constant increases The rest voltage increases The target voltage decreases (input current >0 )
The target voltage increases (input current >0 )
The reset voltage decreases
The time constant decreases
The reset voltage increases
the rest voltage decreases

Answer 1

When the resistance R is decreased in an RC circuit, the time constant decreases, the rest voltage does not change, and the target voltage increases.

Step-by-step explanation:

The time constant is T = RC, and it determines the rate at which a capacitor charges or discharges in an RC circuit. When the resistance R is decreased, the time constant decreases. This means that the capacitor charges or discharges more quickly. The rest voltage is the voltage across the capacitor when it is fully charged or discharged. It does not change with a change in resistance.

The target voltage is the voltage that the capacitor will eventually reach when a non-zero input current is applied. When the resistance R is decreased, the target voltage increases because a smaller resistance allows for a larger current and a larger change in voltage.