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scoundrel [369]
3 years ago
15

Think of the rotating disk as a series of concentric rotating rings. Each ring acts as a circular current loop that produces a m

agnetic field at the center of the disk. Then integrate over all rings to find the total field. What is the expression for the magnetic field at the center of the single circular loop of radius r carrying current I
Physics
1 answer:
ioda3 years ago
8 0

Answer:

Explanation:

Let the current in the coil is i and the radius of the coil is r.

The magnetic field due to the single loop is given by

B = \frac{\mu_{0}}{4\pi}\frac{2i}{r}

where, i is the current in the circular loop and r is the radius of the loop. The direction of the magnetic field at the centre of loop is given by the Maxwell's right hand thumb rule.  

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You stand on a straight desert road at night and observe a vehicle approaching. This vehicle is equipped with two small headligh
choli [55]

Answer:

They can be seen from a distance of 4.372 kilometers.

Explanation:

Using the Reyligh creterion for diffraction through a circular aperture we have

\frac{x}{D}=\frac{1.22\lambda }{d}

where symbol's have their usual meaning

thus applying values we get

D=\frac{dx}{1.22\lambda }

\therefore D=\frac{0.633\times 4.61\times 10^{-3}}{1.22\times 547\times 10^{-9}}\\\\D=4372.77m\\=4.372km

5 0
3 years ago
Dave and Alex push on opposite ends of a car that has a mass of 875 kg. Dave pushes the car to the right with a force of 250 N,
White raven [17]

The net force acting on the car is 65 N to the left

The net force acting on an object is simply defined as the resultant force acting on the object.

From the question given, we obtained the following data:

  • Force applied to the right (Fᵣ) = 250 N
  • Force applied to the left (Fₗ) = 315 N
  • Net force (Fₙ) =?

The net force acting on the car can be obtained as follow:

Fₙ = Fₗ – Fᵣ

Fₙ = 315 – 250

<h3>Fₙ = 65 N to the left </h3>

Therefore, the net force acting on the car is 65 N to the left

Learn more on net force: brainly.com/question/19549734

8 0
2 years ago
Read 2 more answers
In this first example of constant accelerated motion, we will simply consider a car that is initially traveling along a straight
algol13

Answer:

v_{f} =25m/s

Explanation:

Kinematics equation for constant acceleration:

v_{f}  =v_{o} + at=15+2*5=25m/s

4 0
2 years ago
According to the picture of the Electromagnetic spectrum [EMS] below, What color has a wavelength of 700 nm?
White raven [17]

Answer:

Red

Explanation:

I looked at the picture...where it says red is 700

5 0
3 years ago
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When water diffuses across a semi permeable membrane the process is called __________.
expeople1 [14]
Osmosis !!!!!!!!!!!!!!!!!!
6 0
2 years ago
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