Question

When three resistors each of resistance R are connected in parallel the equivalent resistance is 10 ohm hence the value of R_ ohms

Answer 1

Since they are connected in parallel:

1/Rp= 1/R+1/R+1/R = 3/R = 1/10
= R/3 = 10
= R = 30 ohm.

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Answer 2

Since they are connected in parallel:

1/Rp= 1/R+1/R+1/R = 3/R = 1/10

= R/3 = 10  

= R = 30 ohm.