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djverab [1.8K]
3 years ago
9

Explain how a generator creates electricity.

Physics
2 answers:
Solnce55 [7]3 years ago
6 0

Answer:

Explanation:

Interesting question. Basically, it depends on the type of generator. Basically a generator converts mechanical energy into electrical energy.

How does it work? Well let's see an example:

When you have two magnets, they attract to each other right? Well, the reason of this atraction is called "Magnetic Field". When you put a magnet close to another there will be a magnetic force, in other words, one force that will cause any metalic object to be attracted to the magnect. So we could say that there's a magnetic field around the magnet that will make metalic objects be attracted to this magnet.

So, according to physics, if a magnetic field is changing over time it could induce voltage in a conductor.

How can a magnetic field change over time? Well, you can take two magnets and move them with your hands and the magnetic field will be changing over time.

So far we know that, if we change the magnetic field over time, we will generate electricity. But, how do we make the magnetic field change?

Well basically it depends on the type of generator. There are hydroelectric power plants, wind power plants, thermal power plants, etc. Basically, the difference between those power plants is how we make the magnetic field change.

In the case of wind power plants, the wind moves the turbines, that moves the axis of the generator that will make the magnetic field change over time.

In real life, two magnets will never induce enough voltage to power an entire house or a city. So instead of magnets we use what is called "electromagnet", which is basically like creating a magnet with electricity.

This is because when current is flowing through a conductor, it behaves exactly LIKE A MAGNET. So, if instead of magnets we just make current flow through conductors, then the effect will be the same. The magnetic field will change over time when the axis is moved.

I hope I answered your question.

faust18 [17]3 years ago
6 0

Answer:

An armature spins inside the magnetic field created by a permanent magnet. The magnetic field induces a current in the armature, generating electricity.

Explanation:

sample answer on edge

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Explain why you can only change one variable in an experiment
ohaa [14]
The purpose of an experiment is to LEARN the EFFECT of something.

The way you do that is to CHANGE the thing and see what happens.

You can change as many things as you want to.  But If you change
TWO things and observe the result, then you don't know which one
of them caused the effect you see. 

Or maybe BOTH of them working together caused it.  You don't know. 

So your experiment is not really much good.  You need to do it again.
5 0
3 years ago
10. 1. Why is Newton's law of gravitation called universal law ?​
Eduardwww [97]

Newtons law of gravitation is called the universal law of gravitation because it is applicable for all masses at all distances, independent of the medium.

6 0
2 years ago
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Becky has a younger sister. If the sister was half Becky's age when Becky was 6, and Becky is now 70, how old is Becky's sister?
rjkz [21]

Answer:

67

Explanation:

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3 years ago
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The current in a hair dryer measures 19 amps. The resistance of the hair dryer is 14 ohms. What is the voltage?
Masja [62]
Voltage  =  (current) x (resistance)

             =  (19 A)  x  (14 ohms)  =  266 volts .

Note:  Be careful using that thing ! 

It's dissipating

       I² R  =  (19 A)² x (14 ohms)  =  5,054 watts ! ! !

That's an awful lot of power for a blow-dryer ! 

The dryer is certainly not using very much of that power to run the fan. 
Most of it is being used to heat air.  5 kilowatts is more power than most
toasters or microwave ovens use, so please be careful with how much of
your hair or skin you expose to that hot-air blast.  You could probably cook
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6 0
3 years ago
A 13561 N car traveling at 51.1 km/h rounds
Minchanka [31]

Answer:

a) The centripetal acceleration of the car is 0.68 m/s²

b) The force that maintains circular motion is 940.03 N.

c) The minimum coefficient of static friction between the tires and the road is 0.069.

Explanation:

a) The centripetal acceleration of the car can be found using the following equation:

a_{c} = \frac{v^{2}}{r}

Where:

v: is the velocity of the car = 51.1 km/h

r: is the radius = 2.95x10² m

a_{c} = \frac{(51.1 \frac{km}{h}*\frac{1000 m}{1 km}*\frac{1 h}{3600 s})^{2}}{2.95 \cdot 10^{2} m} = 0.68 m/s^{2}

Hence, the centripetal acceleration of the car is 0.68 m/s².

b) The force that maintains circular motion is the centripetal force:

F_{c} = ma_{c}

Where:

m: is the mass of the car

The mass is given by:

P = m*g

Where P is the weight of the car = 13561 N

m = \frac{P}{g} = \frac{13561 N}{9.81 m/s^{2}} = 1382.4 kg

Now, the centripetal force is:

F_{c} = ma_{c} = 1382.4 kg*0.68 m/s^{2} = 940.03 N

Then, the force that maintains circular motion is 940.03 N.

c) Since the centripetal force is equal to the coefficient of static friction, this can be calculated as follows:

F_{c} = F_{\mu}

F_{c} = \mu N = \mu P

\mu = \frac{F_{c}}{P} = \frac{940.03 N}{13561 N} = 0.069

Therefore, the minimum coefficient of static friction between the tires and the road is 0.069.

I hope it helps you!                

3 0
3 years ago
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