Question

Why the polarity of the A.C source changes after certain interval?​

Answer 1

QuestioN :

Why the polarity of the A.C source changes after certain interval?

ANswer :

• The alternating current is commonly represented by a sinusoidal waveform.

• So the AC voltage source is represented by a small sinusoidal waveform with circle surrounding it.

• Unlike DC voltage source, we do not mark positive and negative signs at AC voltage source because the electrons in the alternating current (AC) always reverse its direction.

• In other words, the polarity of the AC voltage source always changes at regular intervals of time.

• So we do not mark positive and negative signs at AC voltage source.

• However, some sources mark either positive sign or negative sign at AC voltage source.

Extra InformatioN :

Alternating Current (AC) example

• The most commonly used alternating current (AC) source is an AC generator.
• The AC generator is an electric device that converts mechanical energy into alternating current (AC).
• We can also convert the mechanical energy into direct current (DC) by using an electric device called DC generator.

Answer 2

QuestioN :

Why the polarity of the A.C source changes after certain interval?

ANswer :

• The alternating current is commonly represented by a sinusoidal waveform.

• So the AC voltage source is represented by a small sinusoidal waveform with circle surrounding it.

• Unlike DC voltage source, we do not mark positive and negative signs at AC voltage source because the electrons in the alternating current (AC) always reverse its direction.

• In other words, the polarity of the AC voltage source always changes at regular intervals of time.

• So we do not mark positive and negative signs at AC voltage source.

• However, some sources mark either positive sign or negative sign at AC voltage source.

Extra InformatioN :

Alternating Current (AC) example

• The most commonly used alternating current (AC) source is an AC generator.
• The AC generator is an electric device that converts mechanical energy into alternating current (AC).
• We can also convert the mechanical energy into direct current (DC) by using an electric device called DC generator.