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3 years ago

In order to create an electromagnet, you would ?

2 answers:

4 0

In order to create an electromagnet, you would wrap an insulated wire around a metal with ferromagnetic properties and apply electric current. Magnetic fields are made when entirely the electrons are turning in the same direction either as a natural phenomenon, in an artificially created magnet or when they are persuaded to do so by an electromagnetic field.

alex41 [277]3 years ago

4 0

Electromagnet is an temporary magnet produced when electric current is passed through specific materials.

The process of production of electromagnet is explained as follows :

From Oersted's law, we know that a current carrying conductor produces a magnetic field around it.

The same principle is applied in the production of electromagnet.

A ferromagnetic material is wound by insulated copper wires. The current is allowed to pass through wounded ferromagnetic material which in turn, produces magnetic field around it, and acts just like a strong electromagnet.

The magnetism is retained as long as there is current flow in the wire.

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You stretch your arm and rotate around the center of yourself in the horizontal plane. Suppose you make 2 full revolutions every

lakkis [162]

(a) The angular speed of the rotation is 12.57 rad/s

(b) The period of the rotation is 0.5 s.

<h3>Angular speed of the rotation</h3>

The angular speed of the rotation is calculated as follows;

ω = 2πN

where;

N is number of revolutions

ω = 2π x (2) = 4π = 12.57 rad/s

<h3>Period of rotation</h3>

$\omega = 2\pi f\\\\f = \frac{\omega}{2\pi} \\\\T = \frac{1}{f} = \frac{2\pi}{\omega} \\\\T = \frac{2\pi}{4\pi} = 0.5 \ s$

<h3>Speed of your finger</h3>

v = ωr

v = 12.57 x 1.2

v = 15.08 m/s

Learn more about angular speed here: brainly.com/question/6860269

8 0

2 years ago

What is the main features of RCCB?

Mekhanik [1.2K]

Main features of RCCB are:

Both wires phase and neutral are connected through RCCB.
Whenever there is any ground fault occurs, then it trips the circuit.
The number of current supplies through the line should go back through neutral.
These are a very effective type of shock protection.

8 0

3 years ago

Which of the following is not an element of installment credit?

olasank [31]

Answer:

I believe it's A. An installment credit has an interest rate, repayment terms and fees, and fixed payment.

3 0

3 years ago

The temperature of a gas is increased by 10degree Celsius. what is the corresponding change on Fahrenheit scale?

Grace [21]

On a Fahrenheit thermometer, the gas becomes 18 degrees warmer.

8 0

3 years ago

☆ Correct and rewrite the following statements:

il63 [147K]

Answer:

<h3>a) </h3><h3>Question:-</h3>

Rubber is a good conductor of electricity.

<h3>Answer:-</h3>

It's incorrect sentence.
As we know that, rubber are an insulators of electricity, and they do not not have free ions which can help in conducting electricity.

So correct sentence is:

Rubber is a bad conductor of electricity.

<h3>b)</h3><h3>Question:-</h3>

Electroplating wastes are useful to human health and environment.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, electroplating of substances releases harmful and toxic substances into the environment causing serious health issues in human, so it's waste substances released into environment can have very harmful effects.

So correct sentence is:

Electroplating wastes are harmful to human health and environment.

<h3>c)</h3><h3>Question:-</h3>

In an LED bulb, the shorter lead is connected to the positive terminal of the battery.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, in an LED bulb their are two terminals that is the positive and the negative. So here the lead connected to the positive terminal is always slightly longer than the lead connected to negative terminal of the bulb.

So correct sentence is:

In an LED bulb, the longer lead is connected to the positive terminal of the battery.

<h3>d)</h3><h3>Question:-</h3>

Pure water conducts electricity.

<h3>Answer:-</h3>

It's incorrect sentence. 
As we know that, pure water is a form of H2O where Hydrogen (H) is positive ion and Oxygen (O) is a negative ion which can conduct electricity when they are in individuals but as in pure water they are in combined form of compound H2O in which they become neutral and can't conduct any electricity.

So correct sentence is:

Pure water can't conduct electricity.

3 0

2 years ago