Answer to Question #224466 in Electric Circuits for ARTI

Question

. The average potential difference between ground

and electrosphere, called the atmospheric electric potential, is approximately 240 kV.

In this model it is assumed that the Earth has a negative electric charge about 6 × 105

C, the resistance R1 under

thunderstorm cloud when lightnings are observed is of the order 104

– 105

Ω; R2 above thunderstorm cloud is

of the order 105

– 106

Ω; the load resistors R3 and R4 are equal to 15 Ω and 150 Ω respectively

1. In the circuit shown above, label the potential difference between electrosphere and ground.

2. Label the electric field pattern around R4.

3. Calculate the total load resistance.

4. Given that the capacitive effect between electrosphere and ground is 2.9 F, calculate the time constant

of this global electric circuit. (Hint: Use effective R as the series combination of resistors R3 and R4)

5. What is the significance of this time constant?

6. discuss the process of charge separation in thunderclouds.

Answer 1

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