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Q.

If an electron revoles in a circular path of radius $0.5 A °$ at a frequency of $5 \times 10^{15}$ cycles/sec. The equivalent electric current is

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a

1.2 mA

b

1.6 mA

c

0.8 mA

d

0.4 mA

answer is A.

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Detailed Solution

$I = \frac{Δ Q}{t} = 1.6 \times 10^{- 19} \times 5 \times 10^{15} = 8 \times 10^{- 4}$

$∴ I = 0.8 mA$

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