1. Find the resistance of 100 m of No. 20 copper wire at 20C. ( = 1.72...

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1. Find the resistance of 100 m of No. 20 copper wire at 20°C. (ρ = 1.72 x 10–6 Ω cm, A = 2.07 x 10–2 cm2.)
2. Find the resistance of 50.0 m of No. 20 aluminum wire at 20°C (ρ = 2.83 x 10–6 Ω cm, A = 2.07 x 10–2 cm2.)
3. Find the length of copper wire with resistance 0.0262 Ω ft and total resistance 3.00 Ω.
4. Find the cross-sectional area of copper wire at 20°C that is 60.0 m long and has resistivity (ρ = 1.72 x 10–6 Ω cm and resistance 0.788 Ω.
5. Find the length of a copper wire with resistance 0.0262 Ω/ft and total resistance 5.62Ω.

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Applied Physics

ISBN: 978-0132109277

10th Edition

Authors: Dale ewen, Neill schurter, P. erik gundersen

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