Question

a silver wire has diameter 0.4 mm and resistivity of 1.6 into 10 to the power minus 8 ohm metre how much length of the wire is required to make a one coil​

Answer 1

Answer:

QESTION OF DIAMETER 12

Explanation:

Peat soils are formed from partially decomposed plant material under anaerobic water saturated conditions. They are found in peatlands (also called bogs or mires). ... These are soils high in organic matter content. Peat formation is influenced by moisture and temperature

Answer 2

Answer:

Resistance= 1 ohm

RESISTIVITY=1.6 * 10-8

DIAMETER=0.4 mm

Radius=0.4/2=0.2 mm = 0.2/1000 m = 0.2 * 10-3

 (R)2=(0.2 * 10-3)2

R2=0.04 * 10-6

Area= pie * R2=22/7  * 0.04*10-6  

                       = 1.25714286 * 10-6

                       = 1.26 * 10-6 m2

NOW Resistance = resistivity * length / area

LENGTH= RESISTANCE * AREA / RESISTIVITY

LENGTH=1 * 1.26 * 10-6 /1.6 * 10-8

               = 126 * 108 *10/16 * 100 * 106

               =1260/16

 LENGTH = 78.75 m

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