Question

Which of the following statements are true? Check all that apply.

A) The electric field between the plates of a parallel-plate capacitor is uniform.
B) A capacitor is a device that stores electric potential energy and electric charge.
C) The capacitance of a capacitor depends upon its structure.
D) A capacitor consists of a single sheet of a conducting material placed in contact with an insulating material.

Answer 1

The correct options are (A), (B) and (C).

Step-by-step explanation:

(A) The electric field between the plates of a parallel plate capacitor is uniform and is given by :

`E=(Q)/(A\epsilon_0)`

Where,

Q is the charge

A is the area of cross section

(B) A capacitor is a device that is used to store electric charges and electric potential energy.

Stored potential energy is given by,
`U=(Q^2)/(2C)`

Where, Q is the charge and C is the capacitance of the capacitor.

(C) The capacitance of a capacitor depends upon its structure.

`C=(A\epsilon_0)/(d)`

A is the area of plate. It determines the structure.

Answer 2

Answers.
a. The electric field between the plates of a parallel capacitor is uniform
b. A capacitor is a device that stores potential energy and electric charges.
c. The capacitance of a capacitor depends upon its structure.

Explanation
Capacitor is a device that is used to store electric charge. The capacitance that can be stored in a capacitor depend on area of overlap of the plates, dielectric used and distance between the two plates of a parallel capacitor.
From the choices given in the question the one that applies are:
a. The electric field between the plates of a parallel capacitor is uniform
b. A capacitor is a device that stores potential energy and electric charges.
c. The capacitance of a capacitor depends upon its structure.