If a capacitor is charged to a voltage V and then connected to a resistor R, wha

Practice Questions

Q1
If a capacitor is charged to a voltage V and then connected to a resistor R, what is the time constant of the circuit?
  1. RC
  2. R/C
  3. C/R
  4. 1/RC

Questions & Step-by-Step Solutions

If a capacitor is charged to a voltage V and then connected to a resistor R, what is the time constant of the circuit?
  • Step 1: Understand that a capacitor stores electrical energy when charged to a voltage V.
  • Step 2: Know that when the charged capacitor is connected to a resistor R, it will discharge through the resistor.
  • Step 3: Learn that the time constant (τ) is a measure of how quickly the capacitor discharges.
  • Step 4: Remember the formula for the time constant in an RC circuit: τ = R * C.
  • Step 5: Identify that R is the resistance in ohms and C is the capacitance in farads.
  • Step 6: Calculate the time constant by multiplying the resistance (R) by the capacitance (C).
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