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Question

The electron with charge q=1.6×1019C moves in as orbit of radius 5×1011 m with a speed of 2.2×106ms1 around an atom.The equivalent current is

A
1.12×106A
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B
1.12×103A
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C
1.12×109A
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D
1.12 A
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Solution

The correct option is B 1.12×103A
Given: The electron with charge q=1.6×1019C moves in as orbit of radius 5×1011m with a speed of 2.2×106ms1 around an atom
To find the equivalent current
Solution:
Current = charge flowing per unit time = charge times the angular frequency
It reduces to the following formula
I=qν2πr
Substituting the values in the above formula yields
I=1.6×1019×2.2×1062×3.14×5×1011I=3.52×101331.4×1011I=0.112×102I=1.12mA
is the required equivalent current.

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