3 - Vector and 3 D Questions Answers

Maths >> Vector and 3-D >> Plane Others

Is area always a vector quantity or it can be a vector quantity?

Asked By: AMIT DAS
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Joshi sir comment

generally it is scalar but in the measurement of flux through a surface it is considered a vector perpendicular to the surface with same magnitude 

Maths >> Vector and 3-D >> Plane AIEEE

line AB intersects CD internally in the ratio K : 1  where K is undefined , these line may be  ( 1) concurrent  ,   (2)  intersecting ,  (3) skew  <  (4)  all of these .     explain plese   ?

 

 

Asked By: SHUBHAM VED
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Joshi sir comment

I think it will be skew because skew lines do not intersect in real points 

show that line perpendicular to x-axis and a line perpendecular to y-axis having slope multipication  -1

Asked By: HARISH
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Joshi sir comment

Angle between two lines is given by the formula

tanθ = (m1-m2)/(1+m1m2)

solve this by taking θ = 90

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