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Question :
Question
(5%) Problem 13: Two power lines, line 1 and line

**Question**

(5%) Problem 13: Two power lines, line 1 and line 2, both of LL 52 m, are strung east-west between two towers. line 1 is 28 m directly above line 2. The current in both power lines is I Ato the west. Assume the power lines are straight and you can use the approximation r12 LL. Randomized Variables 52 m 12 28 81 A A 25% Part (a) Find the magnitude of the magnetic field B21. in teslas, produced by line 1 at line 2. Grade Summary Potential 100 sino coso tano 7 8 9 Attempts remaining: 20 cotano sino acoso per attempt) 1 2 3 detailed view at ano acotano sinho cosho tanho cotanho ODegrees Radians vo Submit I give up! Feedback 0 deduction per feedback. Hints deduction per hint. Hints remaining: A 25% Part (b) What is the direction of the magnetic field produced by line 1 at line 2? im 4 25% Part (c) Calculate the magnitude of the magnetic force F21, in newtons, that the current in line 1 exerts on line 2. i A 25% Part (d) Assume a typical power line has a mass of 890 kg per 1000 m. How many times larger would the current in both lines have to be for the magnetic force on the line to balance the force of gravity?