Derive an expression for the force per unit length between two straight parallel conductors carrying current. Hence define ampere.
Derive an expression for the force per unit length between two straight parallel conductors carrying current. Hence define ampere.
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Answer:
For normal incidence on a plane mirror identify which of these statements are true --
(I) Both the angles of incidence and reflection are 0 degree .
(II) Both the angles of incidence and reflection are 90 degree .
(III) The angles that both the incident ray and the reflected ray make with the mirror surface are 0 degree .
(IV) The angles that both the incident ray and the reflected ray make with the mirror surface are 90 degree ..
A) Only (I) is true .
B) Only (II) is true .
C) Both (I) and (III) are true .
D) Both (I) and (IV) are true ✔