To determine which circuit is wrong, you can use a multimeter to test the voltage and current at various points in each circuit. The circuit with abnormal readings is likely the one that needs to be fixed.
Sometimes, visual inspection can help identify a faulty circuit. Look for loose connections, damaged components, or signs of overheating. However, it is always best to use a multimeter for accurate results.
Some common reasons for a circuit to be wrong include faulty components, incorrect wiring, and inadequate power supply. Environmental factors such as temperature and humidity can also affect circuit performance.
To prevent a circuit from going wrong, you should follow proper wiring guidelines and use high-quality components. Regular maintenance and inspections can also help identify and fix any issues before they become major problems.
It depends on the complexity of the circuit and the level of experience you have. Some simple circuits can be fixed by following basic troubleshooting steps, but for more complicated circuits, it is best to seek the help of a professional electrician or engineer.