A circuit, consisting of three resistances 12 Q, 18 Q and 36 Q respectively, joined in parallel, is connected in series with a fourth resistance. The whole is sup- plied at 60 V and it is found that the power dissipated in the 12 2 resistance is 36 W. Determine the value of the fourth resistance and the total power dissipated in the group.

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17. A circuit, consisting of three resistances 12 2, 18 Q
and 36 2 respectively, joined in parallel, is connected
in series with a fourth resistance. The whole is sup-
plied at 60 V and it is found that the power dissipated
in the 12 Q resistance is 36 W. Determine the value of
the fourth resistance and the total power dissipated in
the group.
Transcribed Image Text:17. A circuit, consisting of three resistances 12 2, 18 Q and 36 2 respectively, joined in parallel, is connected in series with a fourth resistance. The whole is sup- plied at 60 V and it is found that the power dissipated in the 12 Q resistance is 36 W. Determine the value of the fourth resistance and the total power dissipated in the group.
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