Evaluate the effectiveness of using a transformer in electrical energy transmission over long distances.
Question
Evaluate the effectiveness of using a transformer in electrical energy transmission over long distances.
Solution
Transformers play a crucial role in the transmission of electrical energy over long distances. Here are the steps to evaluate their effectiveness:
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Voltage Step-Up: At the generation point, transformers step up the voltage level. High voltage is beneficial for long-distance transmission as it reduces the energy lost as heat due to resistance in the wires. This makes the transmission process more efficient.
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Energy Loss Minimization: Transformers help in minimizing energy loss during transmission. As mentioned above, they step up the voltage for transmission which reduces the current flowing through the line. Since power loss due to resistance (I^2R loss) is directly proportional to the square of the current, reducing the current significantly decreases the energy loss.
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Voltage Step-Down: At the receiving end, transformers step down the high voltage to a safer, usable level. This ensures that the electrical devices receiving the power are not damaged by the high voltage used for transmission.
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Safety: Transformers provide a level of safety by isolating the power supply from the end devices. This can prevent electrical faults from propagating through the network.
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Flexibility: Transformers allow for flexibility in the electrical grid. They can step up or step down voltages as needed, allowing for adjustments based on demand and supply.
In conclusion, the use of transformers in electrical energy transmission over long distances is highly effective. They increase efficiency, reduce energy loss, provide safety, and allow for flexibility in the electrical grid.
Similar Questions
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Transformers are an essential part of the National Grid. What are they used for?To convert electricity from from a.c. to d.c. and vice versaTo adjust the supply of electricity according to how much energy is needed at a given timeTo improve the efficiency with which electrical energy can be transmitted around the countryTo allow energy to be transferred from one energy store to another2What name is given to the type of transformer which allows for the potential difference (‘voltage’) at which electricity is delivered to be increased?A high voltage transformerA boost transformerA step-up transformerA jump-up transformer3A current of 0.5 kA is flowing through a cable of resistance 20 Ω. Calculate the power dissipated in the cable.5 × 106 W10 W10 kW5 W4There is a potential difference of 250 V across an electrical cable. Calculate the amount of energy dissipated in the cable when a current of 100 A flows through it for 10 seconds.25 J2.5 J25,000 J250,000 J5A high voltage power cable transmits electrical energy with an efficiency of 0.8. If 2 × 107 W of electrical power is supplied to one end of the cable, how much is transmitted to the opposite end?1.6 × 109 W4 × 106 W2.5 × 107 W1.6 × 107 W
A transformer can work when it is connected to a ac source. Comment.
Why is electrical energy usually transmitted at high voltage?*1 pointAs little energy as possible is wasted in the transmission cables.The current in the transmission cables is as large as possible.The resistance of the transmission cables is as small as possible.The transmission system does not require transformer
Which of the following types of transformers is used in distributing electricity to consumers?
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