Branch, Loop and Node Analyses

What is the voltage drop across R₂?

A 3.5 V

B 4.18 V

C 1.5 V

D 145 mV

ANS:B - 4.18 V

12-Va/68 - Va/37 - (Va-4)/90 =0

12/68 + 4/90 = Va(1/68 + 1/37 + 1/90)

Va ( 323.41 )=1352
Va=4.18

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