Question 1

Consider an electric field given by E = -133k V/m.

(a) What is the electrical potential difference (V_B-V_A) between the positions Z_A = 3cm and Z_B = 11 cm?

(b) What is the distance on the z-axis between two points whose potential difference is equal to V_B-V_A = 24 V?

Question 2

In a plane capacitor, the plates are separated by 0.5 mm. The armatures carry charges 69 nC and an electric field of modulus 3.8x10⁴ V/m prevails between the armatures. Determine:

(a) the potential difference between the armatures;

(b) capacity;

(c) the area of an armature.