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OLEGan [10]
2 years ago
15

Ac soucre change it polarity how many time

Physics
1 answer:
Karolina [17]2 years ago
6 0
Alternating current (AC) flows half the time in one direction and half the time in the other, changing its polarity 120 times per second with 60-hertz current.
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A wave with a wavelength of 125 meters is moving at a speed of 20 m/s. What is it’s frequency
IceJOKER [234]

Answer:

0.16Hz

Explanation:

wavelength (λ) = 125 meters

speed (V) = 20 m/s

frequency (F) = ?

Recall that frequency is the number of cycles the wave complete in one

second. And its value depends on the wavelength and speed of the wave.

So, apply the formula V = F λ

Make F the subject formula

F = V / λ

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3 years ago
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2.applying the formulae, I = Q/T

T= Q/I

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=50sec.

3. using the formulae i=q/t

i= 120/80

=1.5a.

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