A lightning discharge between clouds during a thunderstorm is of 30 C. The time of the discharge is 10 msec. Determine the average lighting current:

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PGCIL Diploma Trainee EE Official Paper (Held on 17 Dec 2020)
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  1. 2 kA

  2. 3 kA

  3. 4 kA

  4. 1 kA

Answer (Detailed Solution Below)

Option 2 :

3 kA

Free
CT 1: Classification I
10 Qs. 10 Marks 10 Mins

Detailed Solution

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Lightning:-

The visible discharge of electricity occurs when a region of a cloud acquires an excess electrical charge (either positive or negative) that is sufficient to break down the resistance of air.

Current is a measure of the flow of electric charge over time.

It is defined as   

where q = Charge

t = Time

I = Current

Calculation:

Given:

q = 30 C

 t = 10 msec

I = 3 × 103 A

I = 3 kA.

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