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The switch S is the circuit shown in the figure is ideal. If the switch is repeatedly closed for 1 ms and opened for 1 ms, the average value of i(t) is ____________(a) 0.25 mA(b) 0.35 mA(c) 0.5 mA(d) 1 mAI had been asked this question in a job interview.My doubt stems from Advanced Problems on Network Theorems in portion Useful Theorems in Circuit Analysis of Network Theory

Answer»

Right ANSWER is (a) 0.25 mA

For EXPLANATION: Since i = \(\frac{5}{10 × 10^{-3}}\) = 0.5 × 10^3 = 0.5 mA

As the switch is repeatedly close, then i(t) will be a square wave.

So average VALUE of electric current is (\(\frac{0.5}{2}\)) = 0.25 mA.



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