Figure 2 shows three charges ( q 1 = 2 micro C; q 2 = -4 micro C and q 3 = 7 mic

Question

Figure 2 shows three charges (q1 = 2 microC; q2 = -4 microC and q3 = 7 microC) on an equilateral triangle

(each side measures 0.5m).

(a) Find the electric potential at the origin due to q2 and q3.

(b) What is the total potential energy of the system?

(c) How much work is done by the electric field if the charge q1 is moved from its current location (at the origin) to infinity?

Figure 2 shows three charges (q1 = 2 microC; q2 = -4 microC and q3 = 7 microC) on an equilateral triangle (each side measures 0.5m). (a) Find the electric potential at the origin due to q2 and q3. (b) What is the total potential energy of the system? (c) How much work is done by the electric field if the charge q1 is moved from its current location (at the origin) to infinity?

Explanation / Answer

a)

Electric potential at the origin

V=KQ2/r +KQ3/r

V=(9*109)[-4/0.5 + 7/0.5]*10-6

V=54,000 Volts

b)

Electric potential energy

U=Q1V =(2*10-6)*54000

U=0.108 J

C)

WorK done

W=dU =0.108-0

W=0.108 J

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.