Here, R1=R= ? R2=5Ω,V=10 V and P=30 W Hence PR102R100R=R1V2+R2V2=30−5102=30−20=10Ω
NEET UG 2012 — Physics Electromagnetism
The power dissipated in the circuit shown in the figure is 30 Watt. The value of R is 
Held on 30 Apr 2012 · Verified 9 Jul 2026.
20Ω
15Ω
10Ω
30Ω
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