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777dan777 [17]
3 years ago
15

Many doorbells work in the way pictured below. An electromagnet, which is made up of a coil of wire wrapped around a metal core,

causes a metal beater bar to rapidly move up and down. This causes the beater at the end of the bar to strike a bell repeatedly.
How does the electromagnet cause the beater bar to move?
Physics
2 answers:
Morgarella [4.7K]3 years ago
7 0

Answer:

when current is allowed to pass through the electromagnet it produces and magnetic field which eventually causes the bell striker to hit the gong

Explanation:

An electromagnet is a coil of wire around a magnet or metal.

when the door bell button is held down, current flows into a transformer which them steps down the current and passes it to the electromagnet, a magnetic field is created which them makes the bell-striker to hit the gong. in a series of make and break of the circuit, the process is repeated multiple times causing that buzzer sound.

the door bell button completes the circuit but when the bell-striker hits the gong the circuit is broken, the striker returns to its position and completes the circuit again and the process is repeated. this continues as long as the door bell button is held down. it is this make and break of the circuit that produces that buzzer sound of the doorbell

Nina [5.8K]3 years ago
4 0

Answer:

An electric current flows through the electromagnet's wire coil and generates a magnetic field, which produces a force on the beater bar.

Explanation:

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A trombone plays a C3 note. If the speed of sound in air is 343 m/s and the wavelength of this note is
Umnica [9.8K]

The frequency of note C3 is 131 s^{-1}.

<u>Explanation:</u>

Frequency is the measure of repetition of same thing a certain number of times. So frequency is inversely proportional to the wavelength. As wavelength is distance between two successive crests or troughs in a sound wave.

And frequency is the completion of number of cycles in a given time in sound waves. The frequency and wavelength are inversely proportional to each other with velocity of sound being the proportionality constant.

Thus, here the speed of sound is given as 343 m/s, the wavelength of the note is also given as 2.62 m, then frequency will be as follows:

Frequency=\frac{speed of sound}{Wavelength of note}

Thus,

Frequency = \frac{343 m/s}{2.62 m} = 131 s^{-1}

So the frequency of note C3 is 131 s^{-1}.

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3 years ago
Number of conducting plates of a multiplate capacitor is 5. The no. Of capacitors is
Ivahew [28]

Answer:

4 capacitors

Explanation:

Given

n = 5 --- conducting plates

Required

The number of capacitor (c)

This is calculated as:

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So, we have:

c = 5 - 1

c = 4

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