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An electric dipole consists of charges `+- 2.0 xx 10^(-8)` C separated by distance of `+- 2.0 xx 10^(-3)`m. It is placed at a distance of 6 cm from a line charge of linear charge density `4.0 xx 10^(-4) Cm^(-1)` as shown in figure such that the dipole makes an angle of `theta = 60^@` with line AB. Find the force acting on the dipole. A. `0.012 N`B. ` 1.8 N`C. ` 0.04 N`D. none of these |
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Answer» Correct Answer - C `P=2xx10^(-4)xx2xx10^(-3)=4xx10^(-11)Cm` `E=(lamda)/(2piepsilon_(0)x),F=pcostheta((dE)/(dx))` `F=-(pcosthetalamda)/(2piepsilon_(0)x^(2))=(-4xx10^(-11)xxcos60^(@)xx4xx10^(-4))/((1)/(2xx9xx10^(9))xx((6)/(100))^(2))` `=0.04N` |
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