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A circuit shown in the figure has resist...

A circuit shown in the figure has resistances `20 Omega` and `30 Omega`. At what value of resistance `R_x` will the thermal power generated in it be practically independent of small variations of that resistance? The voltage between points `A` and `B` is supposed to be constant in this case.

A

`3 Omega`

B

`7 Omega`

C

`12 Omega`

D

`20 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
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