Given Information:
Current = I = 61 A
Magnetic field = B = 1.30x10⁻⁴
Required Information:
Radius of wire = r = ?
Answer:
r = 0.093 meters
Step-by-step explanation:
Biot-Savart Law is given by
B = μ₀I/2πr
Where μ₀ is the permeability of free space and it is basically a measure of resistance in the formation of magnetic field.
I is the current flowing through the wire and B is the magnitude of the magnetic field produced.
Re-arranging the above equation to find out the radius of the loop
r = μ₀I/2πB
r = 4πx10⁻⁷*61/2π*1.30x10⁻⁴
r = 0.093 m
Hence, the radius of the loop wire is 0.093 meters.
Answer:
The angular acceleration is ![\alpha = 0.4418 \ rad /s^2](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%200.4418%20%5C%20rad%20%2Fs%5E2)
Explanation:
From the question we are told that
The angular speed is ![w_f = 45 \ rev / minutes = \frac{45 * 2 * \pi }{60 }= 4.713 \ rad/s](https://tex.z-dn.net/?f=w_f%20%20%3D%20%2045%20%5C%20%20rev%20%2F%20minutes%20%3D%20%20%5Cfrac%7B45%20%2A%20%202%20%2A%20%20%5Cpi%20%20%7D%7B60%20%7D%3D%204.713%20%5C%20%20rad%2Fs)
The angular displacement is ![\theta =4 \ rev = 4 * 2 * \pi = 25.14 \ rad](https://tex.z-dn.net/?f=%5Ctheta%20%3D4%20%20%5C%20rev%20%20%3D%20%204%20%2A%202%20%2A%20%20%5Cpi%20%3D%20%2025.14%20%5C%20rad)
From the first equation of motion we can define the movement of the record as
![w_f ^2 = w_o ^2 + 2 * \alpha * \theta](https://tex.z-dn.net/?f=w_f%20%5E2%20%20%3D%20%20w_o%20%5E2%20%20%2B%20%202%20%2A%20%20%5Calpha%20%2A%20%20%5Ctheta)
Given that the record started from rest ![w_o = 0](https://tex.z-dn.net/?f=w_o%20%20%3D%20%200)
So
![4.713^2 = 2 * \alpha * 25.14](https://tex.z-dn.net/?f=4.713%5E2%20%20%3D%20%202%20%2A%20%20%5Calpha%20%2A%20%2025.14)
![\alpha = 0.4418 \ rad /s^2](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%200.4418%20%5C%20rad%20%2Fs%5E2)
Answer:
No.
Explanation:
We should not carry an umbrella during an thunderstorm. During thunderstorms, which are accompanied by lightning, electric discharge from the clouds can travle through the cloud metallic rod of the umbrella. This may give an electric shock to the person whos carrying it.
<em>Hope this helped!</em>
So even if it is a tiny degree it can grow and grow into something very big.
For example let’s say you take a measurement of the angle your sofa is and you mistake by a few degrees.No problem!! You will only be a few micro centimetres off.
But if you are a few degrees of in measuring the angle of a nearby star you can be as much as a few million light years off because the angle grows and grows by the time you travel that distance.
So basically even a tiny amount can be catastrophic at a big scale