- #1
asad1111
- 51
- 0
so i went to buy a laptop chrger with rating 19.2v and 3.2A but he gave me a charger with rating 19.2v and 4.2A and said the current rating is not important why is that?
metiman said:Well it's not that the current rating is not important. It is important. But the current rating is a maximum rating. So the higher the better. Having a higher rating gives you a kind of safety factor. It means the charger is able to generate more heat without failing.
Current rating refers to the maximum amount of current that can pass through an electrical conductor without causing damage or overheating. Voltage rating, on the other hand, refers to the maximum amount of voltage that can be applied to a circuit or device without causing damage.
Current and voltage ratings are typically determined through various tests and calculations. The current rating is determined by the conductor's size, material, and temperature rating, while the voltage rating is determined by the insulation material and thickness.
Yes, a device can have different current and voltage ratings. For example, a power outlet may have a voltage rating of 120V but a current rating of 15A, while a light bulb may have a voltage rating of 120V but a much lower current rating of 0.5A.
The current and voltage ratings play a crucial role in determining the performance of a circuit. If a circuit is designed to handle a certain amount of current and voltage and is subjected to higher values, it can cause the components to overheat and fail. On the other hand, if the current and voltage are too low, the circuit may not function properly.
Yes, current and voltage ratings can change over time. Factors such as temperature, aging, and wear and tear can affect the ratings of electrical components. It is important to regularly check and maintain the current and voltage ratings of a circuit to ensure proper functioning and safety.