theAlixer Posted November 24, 2012 Posted November 24, 2012 Hi, i would like some help on this question that was given to me for revision for my exam in a couple of days. A 20,000V overhead power line carries 50kW of power. Calculate the strength of the magnetic field at a point 12 metres away from the power line and give the unit for your answer. the value of k is 2.0 x 10-7 TmA-1 (to answer this question you will need to first calculate the current in the wire) That is what the whole question says. I haven't learnt anything like this, this year so please help me out. thanks in advance.
swansont Posted November 25, 2012 Posted November 25, 2012 Knowing the power and voltage gives you the current, and once you know that it's a matter of finding the magnetic field of a long wire.
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