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A wire of 5.8 m long, 2 mm diameter carr...

A wire of 5.8 m long, 2 mm diameter carries 750 mA current when 22 mV potential difference is applied at its ends. If drift speed of electrons is found `1.7xx10^(-5)` m/s then

A

currenty density is `2.4xx10^(+5)A//m^(2)`

B

current density is `1.6xx10^(+4)A//m^(2)`

C

number of free electrons per unit volume is `2.7xx10^(16)m^(-3)`

D

number of free electrons per unit volume is `8.8xx10^(28)m^(-3)`

Text Solution

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The correct Answer is:
A, D
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