An electric bell has:

i) An interrupter

ii) An electromagnet

iii) A hammer

An electric bell typically includes the following components:

i) An interrupter: The interrupter is a mechanism that opens and closes the electrical circuit in a rhythmic manner. It is responsible for repeatedly breaking and making the electrical connection, which causes the electromagnet to become magnetized and demagnetized in a cyclical manner, leading to the striking of the hammer against the bell or gong.

ii) An electromagnet: An electromagnet is a coil of wire that becomes magnetized when an electric current flows through it. It attracts the hammer when energized.

iii) A hammer: The hammer is a metal or plastic object that strikes a bell or gong to produce a ringing sound. It is typically connected to the electromagnet and is attracted to it when the electromagnet is energized.

So, the correct options are (i), (ii), and (iii).