Question

the ___ can alter frequency of the ringing of bell and also help to prevent sparking

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Answer 1

The battery can alter frequency of the ringing of bell and also help to prevent sparking .

Explanation:

• The frequency for the alternation of ringing of the bell is dependent on the electromagnetic force or electromagnet strength.

• The  electromagnetic strength is in turn dependent on the current.

• The current is generated by the battery.

• The current inside a battery is safe and prevents any kind of sparking to occur.

• Hence is is the battery which can alter frequency of the ringing of bell and also help to prevent sparking.

Answer 2

Answer:

Contact adjustment screw

Explanation:

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