Alternating voltage is a type of electrical current where the flow of electricity periodically reverses direction. This results in a waveform that fluctuates between positive and negative values. Alternating current is the flow of electric charge that changes direction periodically. It is commonly used in household electrical outlets and is the type of electricity generated by power plants. **

Only alternating current (AC) can be transformed because transformers work on the principle of electromagnetic induction, which requires a changing magnetic field. Direct current (DC) does not have a changing magnetic field, so it cannot be easily transformed using traditional transformers. However, DC can be converted to AC using devices like inverters, and then transformed using transformers. This is why AC is the preferred form of electricity for long-distance transmission and distribution. **

Examples of alternating current include the electricity that powers our homes and businesses, as well as the electricity generated by power plants. Alternating voltage can be found in household appliances, such as refrigerators, air conditioners, and televisions, as well as in industrial machinery and equipment. Both alternating current and voltage are essential for the distribution and use of electrical power in our daily lives. **

Alternating current (AC) refers to the flow of electric charge that periodically reverses direction, while alternating voltage refers to the changing voltage levels in an electrical circuit. AC is the type of current that flows through a circuit, while alternating voltage is the type of voltage that is applied to the circuit. In other words, AC is the movement of electric charge, while alternating voltage is the fluctuation in electric potential. **

Transformers only work with alternating current (AC) because they rely on the changing magnetic field produced by the alternating current to induce a voltage in the secondary coil. If direct current (DC) were used, the magnetic field would be constant and therefore no voltage would be induced in the secondary coil. This is why transformers are specifically designed to work with AC. **

Alternating current (AC) was developed by Nikola Tesla, a Serbian-American inventor, electrical engineer, and physicist. Tesla's work on AC power systems laid the foundation for the modern electrical grid and revolutionized the way electricity is generated, transmitted, and used. His development of AC technology was crucial in the "War of Currents" against Thomas Edison's direct current (DC) system, ultimately leading to the widespread adoption of AC as the standard for electrical power distribution. **

A transformer can only function with alternating current (AC) because it relies on the changing magnetic field produced by the alternating current to induce a voltage in the secondary coil. This changing magnetic field is essential for the transfer of energy between the primary and secondary coils of the transformer. Direct current (DC) does not produce a changing magnetic field, so it cannot induce a voltage in the secondary coil and therefore cannot be used with a transformer. **

A transformer can only work with alternating current (AC) because it relies on the changing magnetic field produced by the alternating current to induce a voltage in the secondary coil. In a transformer, the alternating current in the primary coil creates a changing magnetic field, which in turn induces a voltage in the secondary coil through electromagnetic induction. If direct current (DC) were used instead of AC, the magnetic field would not be changing, and therefore no voltage would be induced in the secondary coil. **