Always discharge high voltage capacitors before testing to prevent electrical hazards.
Steps to test a high voltage capacitor:
1. Disconnect the microwave from the power source.
2. Discharge the capacitor using an insulated screwdriver to avoid electric shocks.
3. Remove the capacitor and inspect for physical damage.
4. Use a multimeter set to the resistance mode to check continuity.
5. Observe the meter reading: a good capacitor shows increasing resistance, while a defective one shows zero or infinite resistance.
| Case No. | Lens | Focal Length | Object Distance |
|---|---|---|---|
| 1 | \(A\) | 50 cm | 25 cm |
| 2 | B | 20 cm | 60 cm |
| 3 | C | 15 cm | 30 cm |