Two charges $$q1$$ and $$q2$$ are placed $$30$$ cm apart, as shown in Fig. $$2.135$$. A third charge $$q3$$ is moved along the arc of a circle of radius $$40$$ cm from C to D. The change in the potential energy I of the system is $$q34$$πε$$0k$$, where k is :

Question

Two charges $$q1$$ and $$q2$$ are placed $$30$$ cm apart, as shown in Fig. $$2.135$$. A third charge $$q3$$ is moved along the arc of a circle of radius $$40$$ cm from C to D. The change in the potential energy I of the system is $$q34$$πε$$0k$$, where k is :

Infinity Learn · Accepted Answer

$$U1=14$$πε$$0q1q3(0.4)+q1q2(0.3)+q2q3(0.5)$$ $$U2=14$$πε$$0q1q3(0.4)+q1q2(0.3)+q2q3(0.1)$$⇒∆$$U=U2-U1=14$$πε$$0q2q310.1-10.5$$                               $$=q34$$πε$$0(8q2)$$⇒$$k=8q2$$

Two charges $q_{1} and q_{2}$ are placed 30 cm apart, as shown in Fig. 2.135. A third charge $q_{3}$ is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy I of the system is $(\frac{q_{3}}{4 {πε}_{0}}) k$ , where k is :

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Two charges q1 and q2 are placed 30 cm apart, as shown in Fig. 2.135. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy I of the system is q34πε0k, where k is :

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Two charges $q_{1} and q_{2}$ are placed 30 cm apart, as shown in Fig. 2.135. A third charge $q_{3}$ is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy I of the system is $(\frac{q_{3}}{4 {πε}_{0}}) k$ , where k is :