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Elenna [48]
3 years ago
10

A wire of 5.8m long, 2mm diameter carries 750ma current when 22mv potential difference is applied at its ends. if drift speed of

electrons is found then:_________.
(a) The resistance R of the wire(b) The resistivity p, and(c) The number n of free electrons per unit volume.​
Physics
2 answers:
PSYCHO15rus [73]3 years ago
3 0

Explanation:

According to Ohms Law :

V = I * R

(A) R (Resistance) = 0.022 / 0.75 = 0.03 Ohms

Also,

r =  \alpha  \frac{length}{area}  =   \alpha  \frac{5.8}{3.14 \times 0.001 \times 0.001}

(B)

\alpha(resistivity)  = 1.62 \times {10}^{ - 8}

aryan raj3 years ago
0 0

number of free electrons per unit volume is 8.8x10^28 m^-3

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