Question

In Figure 1 below, a charge Q is fixed. Another charge q is moved along a circular arc MN of radius r around it, from the point M to the point N such that the length of the arc MN = l. The work done in this process is: 

figure 1

विकल्प

• zero 

• `1/(4piε_0).(Qq)/r^2l`

• `(Qq)/(2ε_0r^2)l`

• `(Qq)/(2piε_0r^2)`

Answer 1

In Figure 1 below, a charge Q is fixed. Another charge q is moved along a circular arc MN of radius r around it, from the point M to the point N such that the length of the arc MN = l. The work done in this process is: Zero