Question

. A helium nucleus makes a full rolation in a circle of radius 0.8 metre in two seconds. The value of

the magnetic field B at the centre of the circle will be

(A)

19

0

10

μ



(B) 19

0

10 μ



(C) 10

0

2 10 μ



 (D)

10

0​

Answer 1

Answer:

option a

Explanation:

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