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Network Elements and the Concept of Circuit

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Network Theory

Network Elements and the Concept of Circuit
Network theory miscellaneous

Direction: Fig. shows the statement for given question.

  1. Current i at t = – 0.5 sec will be—
    1. 50
      		amp
      15
    2. 50
      		amp
      20
    3. 5 amp
    4. 3 amp
Correct Option: C

At t = – 0.5 sec
source 30 u (t + 1) → exist and equal to 30V.
2 u (1 – t) → exist and equal to 2 amp.
Now, we will draw the equivalent circuit under this situation, we get

By applying source transformation theorem, we get

Now apply KVL to the loop, we get
30 + 20 – 10 I = 0

I =
50
= 5 amp.
10


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