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 circuit shown below E1 = 4.0 V, R1= 2 W, E2 = 6.0 V, R2 = 4 W and R3 = 2 W. The current I1 is [MP PET 2003]
A) 1.6 A
B) 1.8 A
C) 1.25 A
D) 1.0 A
Correct Answer:
B
Solution :
Applying Kirchhoff?s law for the loops (1) and (2) as shown in figure For loop (1) \[-2{{i}_{1}}-2({{i}_{1}}-{{i}_{2}})+4=0\] Þ \[2{{i}_{1}}-{{i}_{2}}=2\] ?(i) For loop (2) \[-2({{i}_{1}}-{{i}_{2}})+4{{i}_{2}}-6=0\] Þ \[-{{i}_{1}}+3{{i}_{2}}=3\] ?(ii) On solving equation (i) and (ii) \[{{i}_{1}}=1.8A\].