(. 2.3, ), , r 0 㳿, r 1.
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, r 0 r 1 . , .
, , . (. 2.3, ) d :
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( b) , l, , : = b = BlVn. - a () , :
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B, l V , , , a (. 2.3, ). , a = 0 e0 = 0, a = p/2 () :
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a = w t, w = 2p f - , /; t , , - :
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, D t , , , , .
, (. 2.3, ) , , (. 2.3, ) :
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, Im = Em /(r 0 +r 1), :
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, r 1,
( Um = r 1 Im):
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