The drawing shows four point charges. The value of q is 2.0 µC, and the distance d is 0.54 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity. Number Mi d d Units P d 9 <

How far from a 5.50 C point charge will the potential be 200 V? m At what distance will it be 4.00 x 102 v?

An infinite plane of charge with σ=63.6 pC/m2 is shown in the figure. If the sheet is rotated such that α= 45 degrees, find the potential difference VB-VA in volts. Point B is vertically above point A by 3.9 m. Round your answer to 2 decimal places.

If & 1 = 4.0 V, & 2 = 12.0 V, R₁ = 42, R₂ = 122, C = 3 μF, Q = 18 µC, and I = 2.5 A, what is the potential difference V₁ - Vb? R₁ +11 &₁ bow ! R₂ - 30 V O 30 V O 5.0 V & = O -5.0 V 1₁ e 30

The drawing shows four point charges. The value of q is 1.9 µC, and the distance d is 0.82 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity. Number i Units 9

11 of 35 > A potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 1.25 x 10-20 J of work is required to eject a positive sodium ion (Na+) from the interior of the cell, what is the magnitude of the potential difference between the inner and outer surfaces of the cell? magnitude of the potential difference: