13.13 QUESTIONS
  1. A current i(t) = 10 +10 sin 100πt + 5 sin 300πt A is delivered to the positive terminal of a 12 V lead-acid battery for 1 h. Find the charge delivered to the battery.
  2. Is the signal v(t) = sin(21t) + sin(15t – 75°) periodic? If it is, what is the period?
  3. Is the signal images periodic? If it is, what is the period?
  4. Show that (i) product of two odd functions of twill be an even function of t (ii) product of two even functions of t will be an even function of t (iii) product of an odd function of t and an even function of t will be an odd function of t.
  5. The waveform in Fig. 13.13-1 has ω = 1 rad/s. It is time-shifted by t0 to produce v

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