Current entering the positive terminal of an element is mathematically given as

by

Current entering the positive terminal of an element is mathematically given as:

i=10cos 65πt Amps

The electric power supplied by element at t=5 ms when voltage across element is 4i in watts is given as:

  1. 109.2 watts
  2. 53.86 watts
  3. 985 watts
  4. 97.4 watts

Correct answer: 1. 109.2 watts

Solution:

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