PHYSICS

A 4.00 µF capacitor is connected to a 18.0 V battery. How much energy is stored in the capacitor?

This should be a relatively easy problem yet, I can't get it. Isn't it just E=.5*C*V^2

  1. 👍
  2. 👎
  3. 👁
  1. E = (1/2) C V^2, yes

    Remember that the "mu" symbol means "micro- or 10^-6

    E = (1/2)*4*10^-6*(18)^2
    = 6.48*10^-4 J

    Keep three significant figures.

    If your answer sheet or book does not agree with that answer, it is wrong.

    1. 👍
    2. 👎
  2. awesome thanks, that's the correct answer. I was using the wrong conversion. :)

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics!!!

    A 24-V battery is connected in series with a resistor and an inductor, with R = 5.6 Ω and L = 2.0 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. (b) Find the energy stored

  2. AP PHYSICS

    A 3.0-uF capacitor and a 4.0-uF capacitor are connected in series across a 40.0-V battery. A 10.0-uF capacitor is also connected directly across the battery terminals. Find the total charge that the battery delivers to the

  3. Physics

    An air-filled parallel-plate capacitor has plates of area 2.30 cm2 separated by 1.50 mm. (a) Find the value of its capacitance. The capacitor is connected to a 12.0-V battery. (b) What is the charge on the capacitor? (c) What is

  4. Physics

    A 1.5 uF capacitor is connected to a 9.0 V battery. Use PE=1/2C(change in V)^2 to find the energy stored in the capacitor.

  1. Physics

    (a) How much charge does a battery have to supply to a 5.0 uF capacitor to create a potential difference of 1.5 V across its plates? How much energy is stored in the capacitor in this case? (b) How much charge would the batter

  2. physics

    Two capacitors, C1 = 5 μF and C2 = 12 μF, are connected in parallel, and the resulting combination is connected to a 9 V battery. Find (a) the equivalent capacitance of the combination, (b) the potential difference across each

  3. Physics -conceptual

    A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. Which capacitor has the greatest voltage?

  4. Physics

    A 300v battery is connected across capacitors 3uF and 6uF in parallel. Evaluate the charge and energy stored in each capacitor

  1. Physics

    Two capacitor of a capacitance 4uf and 6uf are connected in series to a 100volt DC A.draw the circuit diagram B.calculate the energy on either plates of each capacitor C.potential difference across eàch capacitor D.energy in the

  2. Physics

    Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k = 4.2). The empty capacitor is connected to a 14 -V battery. What must be the potential difference across the plates of the

  3. physics

    please check: A battery converts what type of energy into electrical energy? a. mechanical b. nuclear c. solar d. chemical D When a parallel-plate capacitor is connected to a battery:a____ is stored on one plate, and a ___ is

  4. science

    Which choice most accurately describes the method of storing electrical energy in a battery? A battery can store energy when placed in a circuit. A chemical reaction occurs inside a battery, releasing the energy to push electrons

You can view more similar questions or ask a new question.