The charge of an electron is $6 \times 10^{- 19} C$ . How many electrons strike the screen of a cathode ray tube each second when the beam current is $16 m A$

10^{17}

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10^{19}

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10^{- 17}

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10^{- 19}

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Solution

The correct option is D $10^{17}$
$i = \frac{n e}{t} \Rightarrow 16 \times 10^{- 3} = \frac{n \times 1.6 \times 10^{- 19}}{1} \Rightarrow n = 10^{17}$

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The charge of an electron is 6×10−19C. How many electrons strike the screen of a cathode ray tube each second when the beam current is 16 mA

The correct option is D 1017i=net⇒16×10−3=n×1.6×10−191⇒n=1017

The charge of an electron is $6 \times 10^{- 19} C$ . How many electrons strike the screen of a cathode ray tube each second when the beam current is $16 m A$

The correct option is D $10^{17}$
$i = \frac{n e}{t} \Rightarrow 16 \times 10^{- 3} = \frac{n \times 1.6 \times 10^{- 19}}{1} \Rightarrow n = 10^{17}$