Question

Calculate the work done by electric field when a point charge q is moved from point B to A along the curved path. Given that electric field is created by the stationary charge Q and $V_A=200V,V_B=100V,q=0.05C$, length of line segment AB = 10 cm, length of curved path = 20 cm.

• A. 0 J
• B. 5 J
• C. 10 J
• D. 15 J
• E. 20 J

Answer 1

Answer: (B)

5 J

Given : $q=0.05C$ $V_A=200V$ $V_B=100V$

As the electric field is an conservative field, thus the work done in moving a charge from one point to another is path independent.

$\therefore$ $W_{BA}=q(V_A-V_B)=0.05(200-100)=5$ J