Question

Two insulated copper wires of similar overall diameter have very different interiors. One wire possesses a solid core of copper, with a circular cross section of radius 1.53 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.306 mm. The current density J in each wire is the same. J = 3750 A/m² How much current does each wire carry? solid wire current: A stranded wire current: A The resistivity of copper is ? = 1.69 × 10?? ?·m. What is the resistance of a 4.00 m length of each wire? solid wire resistance: ? stranded wire resistance: ?

          Two insulated copper wires of similar overall diameter have very different interiors.

One wire possesses a solid core of copper, with a circular cross section of radius 1.53 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.306 mm. The current density J in each wire is the same.

J = 3750 A/m²

How much current does each wire carry?

solid wire current: A
stranded wire current: A

The resistivity of copper is ? = 1.69 × 10?? ?·m. What is the resistance of a 4.00 m length of each wire?

solid wire resistance: ?
stranded wire resistance: ?

Two insulated copper wires of similar overall diameter have very different interiors.

One wire possesses a solid core of copper, with a circular cross section of radius 1.53 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.306 mm. The current density J in each wire is the same.

J = 3750 A/m²

How much current does each wire carry?

solid wire current: A
stranded wire current: A

The resistivity of copper is ? = 1.69 × 10?? ?·m. What is the resistance of a 4.00 m length of each wire?

solid wire resistance: ?
stranded wire resistance: ?

Added by Juan Carlos M.

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