In a JFET SELE transistor, there is no voltage source to feed the circuit, from where is the circuit fed with reverse or negative voltage in order for the circuit to work, I need the answer in theory only in a clear, simple and understandable line. Thank you

how it solve it i need explanation please

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For the circuit in Figure below, what is Ic3? Assume all transistors are identical. IREF 1 Q5 R1 IREF2 O IE of Q2 O 2 IREF1 O IE of Q1 Vh1 Q6 Q1 03 07 8 Vn2 04 IREF2 R2

Which of the following conditions must be met to allow the use of the approximate approach in a voltage-divider bias configuration?

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Q.4 – For the voltage-divider bias configuration of figure, the values of Vcc=22.10V, the resistances RB1=140 ohm, RB2=47.60ohm, Rc=1.680hm, Rp=0.831ohm and B=142/are given in Appendix.4 (VBE= 0.7 Volt). Determine in the circuit: VCC a) IBO b) Ico c) VCEQ RC d) ICMAX RB1 e) Vсво oVc + VB VCEQ B= . IBQ oVE RB2 RE

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What is the difference between common emitter and common base?

Please solve it.