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The main reason for preferring usage of AC voltage over DC voltage
  • a)
    AC voltages can be easily and efficiently converted from one voltage to the other by means of transformers
  • b)
    DC uses alternators whereas AC uses generators
  • c)
    DC Batteries are of low voltage
  • d)
    There are no DC generators
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The main reason for preferring usage of AC voltage over DC voltagea)AC...
Explanation:By using the phenomenon of mutual induction, transformers allow us to easily change voltage of AC. This is necessary to cut down poer losses while supplying electricity to our homes
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The main reason for preferring usage of AC voltage over DC voltagea)AC...
The main reason for preferring usage of AC voltage over DC voltage is that AC voltages can be easily and efficiently converted from one voltage to the other by means of transformers.

Explanation:

AC stands for Alternating Current, while DC stands for Direct Current. These two types of electrical currents have different characteristics and applications. AC voltage is used more commonly in power transmission and distribution systems due to several advantages it offers over DC voltage. The main reason for preferring AC voltage is its ease of conversion using transformers.

Advantages of AC voltage:

1. Efficient Conversion: AC voltages can be easily transformed from one voltage level to another using transformers. Transformers work on the principle of electromagnetic induction and are highly efficient in converting AC voltage. This allows for efficient transmission and distribution of electrical power at different voltage levels.

2. Long-Distance Transmission: AC voltage is more suitable for long-distance transmission of electrical power. AC voltages can be easily stepped up to high voltages using transformers, reducing power losses during transmission. This is not possible with DC voltage, which requires expensive and less efficient conversion systems for long-distance transmission.

3. Flexibility in Voltage Levels: AC voltage can be easily stepped up or stepped down to different voltage levels using transformers. This flexibility allows for efficient power distribution at various voltage levels, meeting the requirements of different electrical devices and systems.

4. Lower Cost: AC generators or alternators used to produce AC voltage are generally more cost-effective and readily available compared to DC generators. AC generators are simpler in design and operation, making them more economical for power generation.

5. Compatibility with Inductive Loads: Many electrical devices and systems, such as motors and transformers, operate more efficiently with AC voltage. AC voltage is better suited for driving inductive loads, which are prevalent in various industries and households.

Conclusion:

In conclusion, the main reason for preferring the usage of AC voltage over DC voltage is its ease of conversion using transformers. AC voltage offers several advantages, including efficient conversion, long-distance transmission, flexibility in voltage levels, lower cost, and compatibility with inductive loads. These advantages make AC voltage the preferred choice for power transmission and distribution systems.
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Read the following text and answer the following questions on the basis of the same: TOROIDA toroid is a coil of insulated or enamelled wire wound on a donut-shaped form made of powdered iron. A toroid is used as an inductor in electronic circuits, especially at low frequencies where comparatively large inductances are necessary. A toroid has more inductance , for a given number of turns, than a solenoid with a core of the same material and similar size. This makes it possible to construct high-inductance coils of reasonable physical size and mass. Toroidal coils of a given inductance can carry more current than solenoidal coils of similar size, because larger-diameter wires can be used, and the total amount of wire is less, reducing the resistance . In a toroid, all the magnetic flux is contained in the core material. This is because the core has no ends from which flux might leak off. The confinement of the flux prevents external magnetic fields from affecting the behaviour of the toroid, and also prevents the magnetic field in the toroid from affecting other components in a circuit. Standard toroidal transformers typically offer a 95% efficiency, while standard laminated transformers typically offer less than a 90% rating. One of the most important differences between a toroidal transformer and a traditional laminated transformer is the absence of gaps. The leakage flux through the gaps contributes to the stray losses in the form of eddy currents (which is also expelled in the form of heat). A toroidal core doesn’t have an air gap. The core is tightly wound . The result is a stable, predictable toroidal core, free from discontinuities and holes. Audible vibration or hum in transformers is caused by vibration of the windings and core layers from the forces between the coil turns and core laminations. The toroidal transformer’s construction helps quiet this noise. In audio, or signal transmitting applications, unwarranted noise will affect sound quality, so a transformer with low audible vibration is ideal. For this reason, many sound system engineers prefer to use a toroidal transformer instead of a traditional laminated transformer.Efficiency of toroidal transformer is around ______ % which is ______ than laminated core transformer.

The main reason for preferring usage of AC voltage over DC voltagea)AC voltages can be easily and efficiently converted from one voltage to the other by means of transformersb)DC uses alternators whereas AC uses generatorsc)DC Batteries are of low voltaged)There are no DC generatorsCorrect answer is option 'A'. Can you explain this answer?
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