The number of fermi in $1$ metre is.............

10^{13}

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10^{14}

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10^{15}

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10^{16}

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Solution

The correct option is C $10^{15}$
$1 f e r m i = 10^{- 15} m$
$1 m = \frac{1}{10^{- 15}} = 10^{15} f e r m i$
The correct option is C.

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Question 141

One fermi is equal to $10^{- 15}$ metre. The radius of a proton is 1.3 fermi. Write the radius of a proton (in metres) in standard form.

1.0 \times 10^{15} s^{- 1}

2 \times 10^{- 19} J

n_{1} = 2

n_{2} = 4

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