Z danego wzoru wyznacz wskazaną zmienną. Zapisz wszystkie przekształcenia.
a) k = y/b - 4y ; y = ? b) E = RI + nrI/m ; I = ?
darusica
A) k = y/b - 4y ; /*b-4y k(b-4y)=y y=kb-4ky
b) E = RI + nrI/m /*m Em=RL+nrl /:R+nr em/r+nr=2l /*2 2em/r+nr=l l=2em/r+nr
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okap
A) k = y/ b - 4 y / * b kb = y - 4yb y- 4yb = kb y ( 1 - 4 b ) = kb / : ( 1 - 4b ) y = kb/ 1 - 4b b) E = Rl + nrl / m / * m Em = Rlm + nrl Rlm + nrl = Em l ( Rm + nr) = Em / : Rm + nr l= Em / Rm + nr
k(b-4y)=y
y=kb-4ky
b) E = RI + nrI/m /*m
Em=RL+nrl /:R+nr
em/r+nr=2l /*2
2em/r+nr=l
l=2em/r+nr
kb = y - 4yb
y- 4yb = kb
y ( 1 - 4 b ) = kb / : ( 1 - 4b )
y = kb/ 1 - 4b
b) E = Rl + nrl / m / * m
Em = Rlm + nrl
Rlm + nrl = Em
l ( Rm + nr) = Em / : Rm + nr
l= Em / Rm + nr