(adsbygoogle = window.adsbygoogle || []).push({}); 1. Consider point a which is 70 cm north of a -4.2 µC point charge, and point b which is 74 cm west of the charge (Fig. 17-23).

(a) Determine Vba = Vb - Va.

(b) Determine Eb - Ea.

Magnitude

Direction (counterclockwise from east is positive)

2. Vb-Va=(EPEb/q)-(EPEa/q)

3. I thought I would use that formula since that is what I need, but I don't know how to get V. Please help!

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# Homework Help: Potential difference formula

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