# physics

posted by .

A capacitor has a capacitance of 3 pF. What potential difference would be required to store a charge of 21 pC?
a. 3 V
b. 21 V
c. 7 V
d. 0.14 V

• physics -

C=q/V

V=q/C=21E-9/3E-9=7volts

## Similar Questions

1. ### physics

A battery is attached across several different capacitors connected in series. Which of the following statements are true?
2. ### Physics

A certain capacitor stores 360 J of energy when it holds 9.1 10-2 C of charge. (a) What is the capacitance of this capacitor?
3. ### physics

A certain capacitor stores 473 J of energy when it holds 7.91 x 10−2 C of charge. What is the capacitance of this capacitor?
4. ### Physics

A certain capacitor stores 473 J of energy when it holds 7.91 x 10−2 C of charge. What is the capacitance of this capacitor?
5. ### physics

You have a parallel plate capacitor (with air between its plates) which is attached to a voltage source until the capacitor is fully charged. (a)After detaching the capcitor from the voltage source, you move the capacitor's plates …
6. ### Physics

Two circular metal disc each of 3.00 cm diamter are 1.5 mm apart make a capacitor. A)What is the capacitance of this capacitor if it is in series to a 25 V battery?
7. ### Physics

A capacitor has a charge of 5 µC when charged by a potential difference of 1.5 V. What is the capacitance of the capacitor?
8. ### Physics

A capacitor has a charge of 5 µC when charged by a potential difference of 1.5 V. What is the capacitance of the capacitor?
9. ### Physics Capacitance

Three uncharged capacitors, X, Y, Z, each with capacitance of 12uF each are connected A---------[X]------[Y/Z]-----------B *Y&Z is parallel to each other* A potential difference of 9.0V is applied between points A and B. Explain why …
10. ### physics

An isolated capacitor of unknown capacitance has been charged to a potential difference of 100 V. When the charged capacitor is then connected in parallel to an un- charged 10.0 μF capacitor, the potential difference across the …

More Similar Questions