Answer:
1 C.
Explanation:
Charge: This can be defined as the product of current and time in an electric field. The S.I unit of current is Coulombs (C)
The formula of charge is given as,
Q = It ..................... Equation 1
Where Q = The amount of charge transferred from the cloud to the earth, I = current, t = time.
Given: I = 25000 A, t = 40.0 μs = 40×10⁻⁶ s.
Substitute into equation 1
Q = 25000(40×10⁻⁶ )
Q = 1000000(10⁻⁶)
Q = 1 C.
Hence the charge transferred from the cloud = 1 C.
The amount of charge transferred is 1C.
Given that the current produced during lightning is :
I = 25000 A
and it lasts for a time period of t = 40 μs.
Now, we know that the current is defined as the rate of flow of charge. This means current is the measure of the amount of charge flowing per unit time. Mathematically it is represented as:
I = Q/t
where Q is the amount of charge
t is the time, and I is the current
Rearranging the terms we get:
Q = It
Q = 25000 × (40 × 10⁻⁶) C
Q = 1 C
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