1 Find the resistance of 78 0 m of No 20 aluminum wire at 20C ( 2 83 x 106 cm, A 2 07 x 102cm2 ) 2 Find the resistance of 315 ft of No 24 copper wire with resistance 0 0262 ft 3 Find the resistance per foot of No 22 copper wire if 580 ft has a resistance of 9 57 4 At 77F, 100 ft of No 18 copper wir...

1. Find the resistance of 78.0 m of No. 20 aluminum wire at 20C. ( = 2.83...

Question:

1. Find the resistance of 78.0 m of No. 20 aluminum wire at 20°C. (ρ = 2.83 x 10–6 Ω cm, A = 2.07 x 10–2cm2.)
2. Find the resistance of 315 ft of No. 24 copper wire with resistance 0.0262 Ω / ft.
3. Find the resistance per foot of No. 22 copper wire if 580 ft has a resistance of 9.57 Ω.
4. At 77°F, 100 ft of No. 18 copper wire has a resistance of 0.651. Find the resistance of 500 ft of this wire.
5. Find the resistance of 475 m of No. 20 copper wire at 20°C. (ρ = 1.72 x 10–6 Ω cm, A = 2.07 x 10–2 cm2.)