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CBSE Class 12-science Answered

two small identical electrical dipole AB and CD of dipole moment p each are kept at an angel 120.what isthe resultant dipole moment . if this is the  syestem subjected to E directed along +x direction.what will be the magnitude and direction of torque acting on it? justify ur ans.
 
 
 
 
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Asked by vasturushi | 25 Dec, 2017, 08:06: PM
answered-by-expert Expert Answer
begin mathsize 20px style E f f e c t i v e space m a g n e t i c space d i p o l e space m o m e n t space c a n space b e space g i v e n space b y space r e s u l tan t space v e c t o r space f o r m u l a p with rightwards harpoon with barb upwards on top equals square root of p squared plus p squared plus 2 p p cos left parenthesis 120 end root right parenthesis space equals space square root of 2 p squared plus 2 p squared x left parenthesis negative 1 divided by 2 right parenthesis end root space equals p r e s u t l a n t space v e c t o r space m a k e s space a n space 30 space d e g r e e space a n g l e space w i t h space x space a x i s t h e r e f o r e space t o r q u e space equals space p space X space E space equals space p E sin 30 equals 1 divided by 2 p E space t h i s space a c t s space a l o n g space t h e space z space d i r e c t i o n end style
Answered by Gajendra | 27 Dec, 2017, 10:48: AM

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