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2 years ago

Explain how electricity is generated and distributed, and why it is so useful and powerful for modern society.

Physics

2 answers:

tester [92]2 years ago

4 0

Answer:

One of the ways by which electricity is generated is through hydroelectric generation.

Explanation:

There are various ways by which electricity can be generated, such as hydroelectric (water), geothermal, solar (with the use of photovaltaics).

Using the hydro-power as focus;

Electricity is generated in a power stations or power plants using coal, oil or natural gas as fuel which is used to generate heat.

The heat generated is in turn used to generate steam which is used to power a turbine by spinning it, the spinning turbine activates an electromechanical generator to produce electricity.

(However, in some power stations, with the use of a large water reservoir or dam, water is released from the reservoir and the water flows through the turbine, spinning it.)

The Electric generators transform kinetic energy into electricity and the principle at work is Faraday's law of electromagnetic induction.

The power generated is transmitted at high voltage and low current to substations, where the voltage is lowered so it can be sent on smaller power lines. It is then distributed to transformers in every neighborhood and the transformers also reduce the voltage so that the power that gets into our homes is safe for consumption (use).

Usefulness of Electricity;

The usefulness of electricity cuts across our everyday life, starting from lighting, cooking, laundry, source of power for gadgets and electrical appliances such as computers and TV set, water heater, refrigerator, public transportation systems.

Without electricity, there would be no access to any of the above mentioned necessities of life.

yarga [219]2 years ago

3 0

Answer:

Generation ----transmission---distribution

Explanation:

Electricity is generated from the generating station which could be (thermal, hydro, nuclear, coal etc) ,it is generated at a low voltage and is being step up to a higher voltage with the aid of transformers. This transformers step up and step down voltages from one level to another. At the transmission end they ensure the voltage get to the distribution end .the distribution end ensures the voltages are being supplied to nearby homes. The rated voltage for homes is 230v in some countries or 110V in other countries.

Electricity is useful and powerful for modern society because majority of the equipments in use today depends on electricity for use.which makes it very important.

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barxatty [35]

Answer:

Velocity = 3.25[m/s]

Explanation:

This problem can be solved if we use the Bernoulli equation: In the attached image we can see the conditions of the water inside the container.

In point 1, (surface of the water) we have the atmospheric pressure and at point 2 the water is coming out also at atmospheric pressure, therefore this members in the Bernoulli equation could be cancelled.

The velocity in the point 1 is zero because we have this conditional statement "The water surface drops very slowly and its speed is approximately zero"

h2 is located at point 2 and it will be zero.

$(P_{1} +\frac{v_{1}^{2} }{2g} +h_{1} )=(P_{2} +\frac{v_{2}^{2} }{2g} +h_{2} )\\P_{1} =P_{2} \\v_{1}=0\\h_{2} =0\\v_{2}=\sqrt{0.54*9.81*2}\\v_{2}=3.25[m/s]$

4 0

3 years ago

A circular 10-turn coil with a radius of 5.0 cm carries a current of 5 A. It lies in the xy plane in a uniform magnetic field =

Tju [1.3M]

Answer:

U = – 0.12J

Explanation:

Given N = 10 turns, I = 5A, r = 5×10-²m

B^ = 0.05 T iˆ+ 0.3 T kˆ

Magnitude of the magnetic field vector B = √(0.05²+0.3²) = 0.304T

Area = πr² = π(5×10-²)² = 7.85×10-³m²

Magnetic moment μ = NIA

μ = 10×5×7.85×10-³ = 0.3925Am²

U = -μ•B = –0.3925×0.304 = –0.12J

The sign is negative because the magnetic moment is aligned with the magnetic field.

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2 years ago

Energy energy can be transferred from one form to another we use many Indrajeet Converse in our daily life observe carefully to

aleksandr82 [10.1K]

Answer:

Find the list below.

Explanation:

Energy conversion imply the transformation of energy from one form to another. Examples of these conversions in my home include the following:

1. Chemical energy stored in food is converted to mechanical energy used in working(example sweeping)

2. Chemical energy stored in batteries are used to produce sound energy from the radio.

3. Electrical energy flowing through the wires are used to provide heat energy from the heating device.

4. Electric energy stored in the fan is converted to kinetic energy.

5. Chemical energy stored in petrol is converted to mechanical and electrical energies in the generator.

6. Electric energy supplied by the electric gas cooker is used to generate thermal energy after heating water.

7. Electrical energy flowing through the wires supply light energy in the bulbs.

8. Electric energy is converted to light and sound energy in the televisions.

9. Light energy from the sun is converted to chemical energy in the plants at the garden.

10. Electric energy is converted to sound and light energy in the kitchen blender.

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