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A long straight wire in air carries a current of 5 A. What is the magnetic field intensity H at a radial distance of 5 m from the wire? (b) [4]

A long straight wire in air carries a current of 5 A. What is the magnetic field intensity H at a radial distance of 5 m from the wire? (b) [4]

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Q1 (a) The magnetic field intensity H of an electromagnetic wave propagating in free space in the z-direction is described in phasor form by H = îHe¯ where B is its phase constant. Determine the corresponding electric field from Ampere's law. [8] A long straight wire in air carries a current of 5 A. What is the magnetic field intensity H at a radial distance of 5 m from the wire? (b) [4] A battery of open circuit voltage 2 V and internal resistance 50 SN is connected via a rapid switch to a transmission line of characteristic impedance 50 N terminated in a load of 100 . Calculate the voltage and current on the line just after the switch is closed, explaining your answer carefully. (c) [6]
Transcribed Image Text:Q1 (a) The magnetic field intensity H of an electromagnetic wave propagating in free space in the z-direction is described in phasor form by H = îHe¯ where B is its phase constant. Determine the corresponding electric field from Ampere's law. [8] A long straight wire in air carries a current of 5 A. What is the magnetic field intensity H at a radial distance of 5 m from the wire? (b) [4] A battery of open circuit voltage 2 V and internal resistance 50 SN is connected via a rapid switch to a transmission line of characteristic impedance 50 N terminated in a load of 100 . Calculate the voltage and current on the line just after the switch is closed, explaining your answer carefully. (c) [6]
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