How does the gfci work?
Answer (2)
Step-by-step explanation:Here's how to solve this problem: 1. Find the number of boys: - Since the ratio of boys to girls is 3:2, there are 3/(3+2) = 3/5 of the class that are boys.- Number of boys = (3/5) * 40 pupils = 24 boys 2. Find the number of girls: - Number of girls = 40 pupils - 24 boys = 16 girls 3. Find the number of boys who wear glasses: - We know 2/5 of the boys wear glasses.- Number of boys wearing glasses = (2/5) * 24 boys = 9.6 boys- Since you can't have a fraction of a person, we'll round this down to 9 boys wearing glasses. 4. Find the number of girls who wear glasses: - We know 3/8 of the girls wear glasses.- Number of girls wearing glasses = (3/8) * 16 girls = 6 girls 5. Find the ratio of boys to girls wearing glasses: - The ratio is 9 boys : 6 girls- This can be simplified to 3:2 Therefore, the ratio of the number of boys who wear glasses to the number of girls who wear glasses is 3:2.
Understanding Ground Faults A ground fault occurs when electricity takes an unintended path to ground, often through a person or object. This can happen due to faulty wiring, damaged appliances, or contact with water. GFCI Operation The GFCI works by comparing the amount of current flowing into the circuit (hot wire) to the amount flowing out (neutral wire). If there's a difference, even as small as 4-5 milliamps, the GFCI senses this imbalance and quickly interrupts the circuit, preventing a potentially dangerous shock. How GFCIs Differ from Circuit Breakers While both GFCIs and circuit breakers are safety devices, they serve different purposes. Circuit breakers protect against overloads and short circuits, while GFCIs specifically protect against ground faults, which can cause electrical shocks. Types of GFCIs There are three main types of GFCIs: - Receptacle-type GFCIs: These are the most common type, resembling a standard wall outlet with additional "test" and "reset" buttons.- Circuit breaker GFCIs: These are installed in the electrical panel and protect an entire circuit.- Portable GFCIs: These are used for temporary applications, such as outdoor power tools or construction sites. Importance of Testing GFCIs It's crucial to test GFCIs regularly to ensure they are functioning correctly. Monthly testing is recommended. Conclusion GFCIs are essential safety devices that protect individuals from electrical shocks. By quickly interrupting the flow of electricity in the event of a ground fault, they significantly reduce the risk of electrocution. Regular testing and maintenance are crucial to ensure their effectiveness.
