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Question 1: Calculate the self-inductance of: (a) 5 cm of coaxial cable with a- 0.4 mm and b-2 mm, filled with material for which Hr-30; (b) a solenoid having 100 turns about a cylindrical core of4 cm radius in which μ.-50 for 0 < ρ < 1 cm and μ,-1 for l < ρ < 2 cm; the length of the solenoid is 25 cm. (5+5-10 marks)
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