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Question

If Iron man’s particle accelerator has a radius 1π meters and 1011 electrons flow with 2×108 m/s speed in the anticlockwise direction. Then find the current in the circuit and also its direction.


A

1.6 A, clockwise

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B

1.6 A, anticlockwise

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C

8 A, clockwise

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D

2 A, anticlockwise

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Solution

The correct option is A

1.6 A, clockwise


Distance to be covered = Circumference of the circular path = 2πr = 2π×1π = 2 m

Time taken, t= 22×108 =108 s

We know that, I = net

= 1011×1.6×1019108 = 1.6 A

The direction of current is opposite to direction of flow of electrons. So current is clockwise.


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