Question

calculate the length of a copper wire to be used as a shunt the diameter of wire is 4mm

Answer 1

Answer:

Clearly, one round of wire covers 4mm=

10

4

cm in thickness of the surface of the cylinder and length of the cylinder is 24cm

Number of rounds to cover =24cm=

10

4

24

=

4

24×10

=60

Diameter of the cylinder =20cm

Radius of cylinder =10cm

Length of the wire in completing one round =2πr=2π×10cm=20πcm

Length of the wire in covering the whole surface

= Length of the wire in completing 60 rounds =(20π×60)cm=1200πcm

Radius of copper wire =2mm=

10

2

cm

Volume of wire =(π×

10

2

×

10

2

×1200π)cm

3

=48π

2

cm

3

So weight of wire =(48π

2

×8.88)gm=426.24π

2

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