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In the circuit shown, find the current through 4Ω resistor using Superposition theorem.(a) 4(b) 5(c) 6(d) 7I have been asked this question during an internship interview.The above asked question is from Superposition Theorem topic in portion Useful Theorems in Circuit Analysis of Network Theory

Answer»

The correct OPTION is (B) 5

To elaborate: Considering the voltage source 20V, 5A current source is OPEN circuited.

Now current through 3Ω resistor is20/(5+4)=2.22A.

Now considering the current source 5A, 20V voltage source is short circuited.

No current through 3Ω resistor IS5 × 5/(4+5)=2.78A. Now finally the current through 3Ω resistor is 2.22 + 2.78 = 5A.



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