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Two resistances R1 and R2 have effective...

Two resistances `R_1` and `R_2` have effective resistance `R_s` when connected in series and `R_p`, when connected in parallel. If `R_s R_p = 16` and `R_1//R_2 = 4`, calculate the values of `R_1` and `R_2` (in units of resistance).

A

`R_1 = 2, R_2 = 0.5`

B

`R_1 = 1, R_2 = 0.25`

C

`R_1 = 8, R_2 = 2`

D

`R_1 = 4, R_2 = 1`.

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