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Dima020 [189]
2 years ago
9

If the loop is removed from the field region in a time interval of 2.8 ms , find the average emf that will be induced in the wir

e loop during the extraction process. Express your answer in volts.
Physics
1 answer:
nekit [7.7K]2 years ago
7 0

The question is incomplete. The complete question is :

A circular loop of wire with a radius of 15.0 cm and oriented in the horizontal xy-plane is located in a region of uniform magnetic field. A field of 1.2 T is directed along the positive z-direction, which is upward. (a)If the loop is removed from the field region in a time interval of 2.8 ms, find the average emf that will be induced in the wire loop during the extraction process.

Solution :

Let us consider a $\text{circular loo}p \text{ of wire}$ which has a \text{radius} of r = 15 cm.

It is oriented horizontally along the xy-plane and is located in the region of an $\text{uniform magnetic field}$, such that it points in the positive z direction and having a magnitude of B = 1.2 T.

Now if the loop $\text{is removed from the field region}$ in a time interval of Δt = 2.8 ms. Initially the magnetic field and the area points is in the same direction, so that the angle between them is Ф = 0°, thus the initial and the final fluxes are :

$\phi_{B,i}=BA \cos (\phi) = BA  $    and   $\phi_{B,f} = 0$

Area A = $\pi r^2.$ The induced emf equals to the change in the flux, and is divided by the time that it takes to go from the initial flux, Δt and multiplied by the number of turns N = 1, i.e. ,

$\epsilon = -\frac{\Delta \phi_{B}}{\Delta t}$

  $=-\frac{0-(1.2 T)\pi(0.15^2)}{2.8 \times 10^{-3}}$

  = 30.27 V

Therefore, the emf generated is 30.27 V.

 

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Igoryamba

Answer:

Increases, increases

Explanation:

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Recall that power is given by P= V^2/R where;

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2 years ago
The energy of a photon of light is __________ proportional to its frequency and __________ proportional to its wavelength.
icang [17]

Answer:

D) directly, inversely

Explanation:

The energy of a photon of light is directly proportional to its frequency and inversely proportional to its wavelength.

Frequency is the number of waves that passes through a point per unit of time.

Wavelength is the is the distance between successive crests or troughs on a wave.

 Mathematically, frequency is related to wavelength and velocity using;

             Energy   =  h x f

                      where h is the Planck's constant

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                   Since c  = f ∧

where f is the frequency of the wave

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           c is the speed of light

So;

                 f  = c/∧

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From the equation, we see an inverse relationship between E and wavelength and a direct one with frequency.

           

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True : yes there are planets in the universe without a parent star called

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5 0
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