All categories

4 years ago

Explain why generators are an important use of electromagnets.

2 answers:

8 0

A generator is a tool that is used in generating electriity. It converts mechanical energy into electrical energy in order to be used in an external circuit. The motors used for the conversion of energy contains a wire coil that is in a magnetic field. This wire coil is being used as a motor or as a generator. Using it as a generator, the wire coil should be spun results to inducing a current in the coil. When a wire coil is being spun in magnetic field, an AC electricity at constant rate is being produced which is then used by an external circuit. Generators are especially important during times of black out and lack of electricity supply from providers.

Ulleksa [173]4 years ago

6 0

<span> Generators are important because they can provide electricity during a power outage. This is especially important at hospitals, so doctors and nurses can continue to treat patients during a power outage.</span>

You might be interested in

Can someone please help me

pishuonlain [190]

Answer:

F = ma

10+15-5=2×a

20=2a

a = 10ms^-2

7 0

3 years ago

In the nuclear fission process mass is converted into energy. Determine the total mass that must be converted to energy in one y

brilliants [131]

Answer:

1) Mass that needs to be converted at 100% efficiency is 0.3504 kg

2) Mass that needs to be converted at 30% efficiency is 1.168 kg

Explanation:

By the principle of mass energy equivalence we have

$E=mc^{2}$

where,

'E' is the energy produced

'm' is the mass consumed

'c' is the velocity of light in free space

Now the energy produced by the reactor in 1 year equals

$Energy=Power\times time\\\\\therefore Energy=1\times 10^{9}\times 365\times 24\times 3600\\\\Energy=31.536\times 10^{15}Joules$

Thus the mass that is covertred at 100% efficiency is

$mass=\frac{Energy}{c^{2}}\\\\mass=\frac{31.536\times 10^{15}}{(3\times 10^{8})^{2}}\\\\mass=\frac{31.536\times 10^{15}}{9\times 10^{16}}\\\\\therefore mass=0.3504kg$

Part 2)

At 30% efficiency the mass converted equals

$mass|_{30}=\frac{mass|_{100}}{0.3}\\\\mass|_{30}=\frac{0.3504}{0.3}\\\\mass|_{30}=1.168kg$

8 0

4 years ago

Find the kinetic energy of a ball of mass 200 grams moving at a speed of 20 m/s.

DedPeter [7]

Answer:

40KJ

Explanation:

m=200g

V=20m/s

Ek=?

Ek=(m*V²)/2

Ek=(200*20²)/2

Ek=(200*400)/2

Ek=80 000/2

Ek=40 000 J =40KJ

3 0

3 years ago

Explain why it is better to use a cable with a low resistance than to use a cable with a high

blondinia [14]

Explanation:

The primary reason for this is efficiency. In most applications, a lower resistance means less power is converted to heat and lost to the surrounding environment and more of the supplied power gets to its intended destination.

3 0

2 years ago

Why do we need to take care of the surface water/groundwater?

ANEK [815]

Answer:

sghskm

rohit zimheisbwhx

3 0

3 years ago

Read 2 more answers