5. The circuit given below is a regulated power supply. Assume that the transistor is silicon with heE = 100, and that the zener diode is a 5.7 V device with %3D an Iz= 10 mA %3D a) Consider initially that Vcc 20 volts and find each of the indicated quantities %3D RB i) IRB %3D 358 ohms 01 ii) VB %3D 01 iii) VE RL %3D 25 iv) Ic v) IB %3D vi) Iz = b) Consider now that the supply voltage, Vcc, ripples between 15 and 20 volts. Determine the largest allowed value of Rp such that the diode remains solidly Zenering.

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.