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ivann1987 [24]
4 years ago
14

The charger for your electronic devices is a transformer. Suppose a 60 Hz outlet voltage of 120 V needs to be reduced to a devic

e voltage of 3.0 V. The side of the transformer attached to the electronic device has 70 turns of wire.
How many turns are on the side that plugs into the outlet?
Physics
1 answer:
Natalija [7]4 years ago
7 0

Answer:

number of turns attached to the side that plugs into the outlet is 2800 turns of wire.

Explanation:

Given;

outlet voltage, V₁ = 120 V

inlet voltage, V₂ = 3.0 V

number of turns of wire attached to the inlet voltage, N₂ = 70 turns of wire.

number of turns of wire attached to the outlet voltage, N₁ = ?

Determine number of turns of wire attached to the outlet voltage based on turn ratio;

V₁ / V₂ = N₁ / N₂

120 / 3 = N₁ / 70

40 = N₁ / 70

N₁ = 40 x 70

N₁ = 2800 turns of wire

Therefore, number of turns attached to the side that plugs into the outlet is 2800 turns of wire.

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Light of wavelength 480 nm illuminates a pair of slits separated by 0.27 mm. If a screen is place 1.7 m from the slits, determin
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Answer:

  Δy = 6.05 mm

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      d sin θ = (m + ½) λ       destructive interference

      m = 0,±1, ±2, ...

As they tell us that they measure the dark stripes, we are in a case of destructive interference, let's use trigonometry to find the sins tea

      tan θ = y / x

      y = x tan θ

In the interference experiments the measured angle is very small so we can approximate the tangent

      tan θ = sin θ / cos θ

     cos θ = 1

     tan θ = sin θ

     y = x sin θ

We substitute in the destructive interference equation

     d (y / x) = (m + ½) λ

    y = (m + ½) λ x / d

The first dark strip occurs for m = 0 and the third dark strip for m = 2. Let's find the distance for these and subtract it

 m = 0

      y₀ = (0+ ½) 480 10⁻⁹ 1.7 / 0.27 10⁻³

      y₀ = 1.511 10⁻³ m

 m = 2

     y₂ = (2 + ½) 480 10⁻⁹ 1.7 / 0.27 10⁻³

     y₂ = 7.556 10⁻³ m

The separation between these strips is Δy

     Δy = y₂-y₀

     Δy = (7.556 - 1.511) 10⁻³

     Δy = 6.045 10⁻³ m

     Δy = 6.05 mm

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a bicyclist initially at rest speeds up steadily during this time interval she averages 3.50 miles per second determine the init
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Answer:

Explanation:

Given parameters:

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Unknown:

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Solution:

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At a state of rest, a body has no speed.

Average speed is the sum total of the speed covered at each time interval. This value is given already to be 3.5miles per second.

Final speed is the speed before the bicycle halts. This speed will be the same as the average speed here which is 3.5miles per second.

Speed is the rate of change of distance with time.

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