Discussion
Consider the following statements about the global electric circuit.
1. Thunderstorms act as the generators of the circuit.
2. Fair weather regions carry the return conduction current.
3. The circuit would persist unchanged without thunderstorms.
Answer: B
The first two are correct and describe the circuit. The third is wrong, since conduction would discharge the ionosphere within about ten minutes were the generators to stop. Continuous thunderstorm activity is therefore essential.
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