1. Find the resistance of 134 m of No. 20 copper wire at 20C ( = 1.72...

1. Find the resistance of 134 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 length of a copper wire with resistance 0.0273 Ω/ft and total resistance 3.97 Ω.
3. Find the cross-sectional area of copper wire at 20°C that is 55.4 m long and has resistivity (ρ = 1.79 x 10–6 Ω cm, and resistance 0.943Ω.
4. A heating element operates on 115 V. If it has a resistance of 15.4Ω, what current does it draw?
5. A heating coil operates on 220V. If it draws 8.75 A find its resistance.
6. What current does a 234-Ω resistance draw on 115 V?
7. Four resistors of 3.40Ω, 6.54Ω, 8.32Ω, and 1.34 Ω are connected in series with a 12.0-V battery. Find the total resistance of the circuit.
8. Find the current in Problem.