What suitable input device would be used for each of the following:1. Public address system in a railway station2. Digital Thermometer3. Photographers light meter4. Time Delay circuit for courtesy lights in a car5. Pilot light flame detector in a gas central heating system6. Sunlight hours recorder at a weather stationplease choose from either1. Capacitor2. Microphone3. Thermistor4. Solar cell5. LDR6. Thermocouple
The whole premise is incorrect: That's just a SAYING about lightning never striking twice in the same place. Of course it's not true. Otherwise, why would anyone have lightning rods?
I think the statement refers to striking twice in a row or within the same storm formation.
Lightning can strike the same spot twice. The pole on the Empire States Building is hit more than twenty time a year. Lightning is nessicery for putting nitrogen back into the soil so if is ever stopped storming crops would no longer grow.
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The statement has little to actually do with lightning, especially these days. It really applies to human nature and events. Before the advent of tall buildings and lightning rods, it was rare for lightning to strike the same location twice; there were many likely targets. While it could happen, it was outside the daily experience of most people, and back then, that's about all they had to work with. The statement came to mean any event that rarely happened twice to the same person or group; like a previous poster said, winning the lottery twice, or any other event that's rare enough the first time, and extremely unlikely the second.
