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Quick Revision: Alternating Current | Physics Class 12 - NEET PDF Download
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FAQs on Quick Revision: Alternating Current - Physics Class 12 - NEET
| 1. What is alternating current? |  |
Ans. Alternating current (AC) is an electric current that periodically changes direction, flowing first in one direction and then reversing to flow in the opposite direction. This type of current is commonly used in households and industries to power electrical devices.
| 2. How is alternating current generated? | |
Ans. Alternating current is generated by an electrical generator, which consists of a rotating electromagnet within a magnetic field. As the magnet rotates, it induces a continuously changing voltage in the wire coils, resulting in the production of alternating current.
| 3. What are the advantages of alternating current over direct current? | |
Ans. Alternating current has several advantages over direct current. Firstly, it can be transmitted over long distances with less power loss compared to direct current. Secondly, it is easier to change the voltage of alternating current using transformers, making it suitable for different applications. Lastly, alternating current can be easily generated using power plants, allowing for efficient distribution.
| 4. How does alternating current differ from direct current? | |
Ans. The main difference between alternating current (AC) and direct current (DC) lies in the direction of the flow of electrons. In AC, the electrons periodically change their direction of flow, while in DC, the electrons flow consistently in one direction. AC is typically used for large-scale power distribution, while DC is commonly used in batteries and electronic devices.
| 5. What are the safety considerations when working with alternating current? | |
Ans. When working with alternating current, it is important to take certain safety precautions. This includes ensuring proper insulation of wires and electrical devices, using appropriate protective gear such as gloves and goggles, and following proper grounding techniques. It is also crucial to be aware of the potential hazards of electrical shocks and to handle electrical equipment with caution to prevent accidents.
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