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3 years ago

The magnet below is cut in half. what will be the result?

Physics

1 answer:

garik1379 [7]3 years ago

4 0

Answer:

Explanation:

This is what we call a permanent magnet. By the way, the magnetic phenomena were first observed about 2500 years ago near the ancient city of Magnesia, what is today Manisa, located in western Turkey, when people saw fragments of magnetized iron. So what happens if you cut a magnet in half? Well, a magnet has two ends, the first one is called a north pole or N pole while the other end is a south pole or S pole, so if you break a bar magnet, each piece has a north and south pole, no matter the size of each new bar although the smaller the piece, the weaker its magnetism. This is true because unlike electric charges, you always find magnetic poles in pairs, that is, ¡they can't be isolated! The option is C. because in the great bar the north pole is to the left while the south pole is to right.

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Answer:

17.46° W of N

Explanation:

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sinθ = 3/10

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3 years ago

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3 years ago

A 259-kV power transmission line carrying 429 A is hung from grounded metal towers by ceramic insulators, each having a 0.71×109

ella [17]

Answer:

The resistance is $7.47\times10^{6}\ \Omega$ .

Explanation:

Given that,

Power = 259 kV

Current = 429 A

Resistance $R=0.71\times10^{9}\ Omega$

We need to calculate the current in each insulator

Using formula of current

$I=\dfrac{P}{R}$

Put the value into the formula

$I=\dfrac{259\times10^{3}}{0.71\times10^{9}}$

$I=3.64\times10^{-4}\ A$

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Using formula of resistance

$\dfrac{1}{R}=\sum_{i=1}^{95}\dfrac{1}{R_{i}}$

Put the value into the formula

$\dfrac{1}{R}=\dfrac{95}{0.71\times10^{9}}$

$\dfrac{1}{R}=1.338\times10^{-7}$

$R=\dfrac{1}{1.338\times10^{-7}}$

$R=7473841.5=7.47\times10^{6}\ \Omega$

Hence, The resistance is $7.47\times10^{6}\ \Omega$ .

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