posted by .

A fully charged 98 uF capacitor is discharged through a 125 ohms resistor. How long will it take for the capacitor to lose 75% of its initial energy

  • physics -

    The time constant is RC = 0.0123 seconds

    To lose 75% of its energy, the voltage on the capacitor must fall in half.

    V/Vo = e^(-t/0.0123) = 0.500

    Solve for t.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A capacitor of capacitance C= 10mF, is charged using a battery of potential V, through a resistor of resistance R = 250 ohms. the charge of the capacitor is given by Q(t)=CV[1− e ^ (−t/RC)] Find an expression for the current …
  2. physics

    A 20.0 \mu F capacitor initially charged to 20.0 \mu C is discharged through a 1.90 k\Omega resistor. How long does it take to reduce the capacitor's charge to 5.00 \mu C?
  3. Physics

    How long will it take a charged 80-ìF capacitor to lose 20 percent of its initial energy when it is allowed to discharge through a 45 ohm resistor?
  4. Physics

    In a portable defibrillator, energy is stored in a capacitor charged to a high potential difference. The capacitor is discharged through the patient’s body in a short, high-powered pulse. a) The capacitor in a portable …
  5. Physics

    A fully charged 90-µF capacitor is discharged through a 60-Ω resistor. How long will it take for the capacitor to lose 80% of its initial energy?
  6. Physic II

    Suppose a capacitor having a capacitance of C fully charged to a voltage V and then discharged through a resistor R. Derive the equation (in terms of C,V,and R) that shows how long a time the capacitor will take to lose 45 % of its …
  7. Physics

    How long will it take the voltage across the capacitor in an RC circuit to discharge 75% of its initial charged voltage if the resistor has a resistance of 450 kilo-Ohms and the capacitor has a capacitance of 49 micro-farads?
  8. Physics

    A 600W flashlamp fitted to a camera is operated by discharging a 10 000 uF capacitor through the lamp. The capacitor is charged initially from a 6V battery. Calculate A) the energy stores in the capacitor when fully charged B) the …
  9. Physics

    A 14.1 μF capacitor is charged to a potential of 45.0 V and then discharged through an 80.0 Ω resistor. (a) How long after discharge begins does it take for the capacitor to lose 90.0% of the following?
  10. Physics

    A charged capacitor,C=10e-6 F, with an initial stored energy of 3.5J, is discharged across a resistor, R. The charge on the capacitor drops to 40% of its maximum value in time, t=8.2s, from the instant the switch is closed (t=0). Find …

More Similar Questions