Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर
JEE Main & Advanced
Physics
Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर
Question Bank
Critical Thinking
question_answer
In the following circuit, 5 W resistor develops 45 J/s due to current flowing through it. The power developed per second across 12 W resistor is [AMU (Engg.) 1999]
A) 16 W
B) 192 W
C) 36 W
D) 64 W
Correct Answer:
B
Solution :
\[\frac{{{i}_{1}}}{{{i}_{2}}}=\frac{15}{5}=\frac{3}{1}\] ? (i) Also \[\frac{H}{t}={{i}^{2}}R\Rightarrow 45={{({{i}_{1}})}^{2}}\times 5\] Þ \[{{i}_{1}}=3\,A\] and from equation (i) \[{{i}_{2}}=1\,A\] So \[i={{i}_{1}}+{{i}_{2}}=4\,A\] Hence power developed in \[12\,\Omega \] resistance \[P={{i}^{2}}R={{(4)}^{2}}\times 12=192\,W\]