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After everyone in our class got less than 50% on our first physics test this term, (AC, magnetic flux, frequency/oscillations), our teacher decided to give us a retest. Though, he hasn't gone over anything else, so i thought i'd ask a couple questions here.
1. I was taught that Inductive Reactance (XL) = wl, and that Inductive Capacitance (XC) = wc. I heard today though, that XL actually = iwl, (i = sqrt(-1)), and XC actually = 1/(iwc). Is this true? If it's true, then is it also true that these reactances work similar to resistances in DC? (ie EMF=I(XL + XC + R) for series L, C, and R.
2. Is there a simple way to prove that E(field) = (V x B) for a spherical conductor? One of the 'simple' problems on the test had to have this to be able to solve it, but my teacher has been too busy to explain it.
that's all i can think of for now...
1. I was taught that Inductive Reactance (XL) = wl, and that Inductive Capacitance (XC) = wc. I heard today though, that XL actually = iwl, (i = sqrt(-1)), and XC actually = 1/(iwc). Is this true? If it's true, then is it also true that these reactances work similar to resistances in DC? (ie EMF=I(XL + XC + R) for series L, C, and R.
2. Is there a simple way to prove that E(field) = (V x B) for a spherical conductor? One of the 'simple' problems on the test had to have this to be able to solve it, but my teacher has been too busy to explain it.
that's all i can think of for now...