The variation of EMF with time for four types of generators is shown in the figures. Which amongst them can be called AC voltage?
- A(a) and (d)
- B(a), (b), (c), and (d)
- C(a) and (b)
- Donly (a)
Solution & Step-by-step Explanation
AC voltage is defined as a voltage that changes its polarity periodically with time.(a) is sinusoidal AC.(b) and (c) also change polarity periodically around zero.In standard definitions, any periodically alternating polarity signal is AC.Note: In some specific contexts, saw-tooth and square are also categorized under AC generators.Based on the options provided in NEET 2019, the most inclusive definition was accepted.