Assertion: The angle between the two vectors `(hati+hatj)` and `(hatj+hatk)` is `(pi)/(3)` radian.
Reason: Angle between two vectors `vecA` and `vecB` is given by `theta=cos^(-1)((vecA.vecB)/(AB))`

Options

A. (a) Both assertion and reason are correct and reason is the correct explanation for assertion.
B. (b) Both assertion and reason are correct and reason is not the correct explanation for assertion.
C. (c) Assertion is correct but reason is incorrect.
D. (d) Both assertion and reason are incorrect.

Answer

A, B, C, D

Explanation

`e=L(di)/(dt) rArr ("volt-sec")/("Ampere")=L("Henery")`
`L/R=` Time constant , `[L]=ohm-sec`
`phi=LIrArr ("weber")/("Ampere")=L("Henery")`
`E=1/2 rArr LI^(2)=("Joule")/(("Ampere")^(2))=Z ("Henery")`