Refer figure of Q. 144, after maximum collector current, there is no further change in collector current, the magnetic field around \( T_{2} \) ceases to grow. As soon as the field becomes static, there will be no further feedback from \( T_{2} \) to \( T_{1} \). Without continued feedback, the ...A... current begins to fall. Consequently, collector current decreases from \( Y \) to \( Z \). However, a decrease of collector current causes the magnetic field to decay around the coil \( T_{2} \). Thus, \( T_{1} \) is now seeing a ...B ... field in \( T_{2} \) (opposite form what it saw when field was growing at the initial start position). Here, \( A \) and \( B \) refer to
(a) emitter, rising
(b) emitter, decaying
(c) collector, rising
(d) collector, decaying
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