The given transistor operates in saturation region then what should be the value of $$V_{B B}$$ ?

$$\begin{aligned} & \left(R_{\text {out }}=200 \Omega, R_{\text {in }}=100 \mathrm{~k} \Omega, V_{C C}=3 \mathrm{~V},\right. \\\\ & \left.V_{B E}=0.7 \mathrm{~V}, V_{C E}=0, \beta=200\right) \end{aligned}$$

If voltage across a zener diode is 6V, then find out the value of maximum resistance in this condition.

Assertion : Photodiode and solar cell work on same mechanism.

Reason : Area is large for solar cell.

The diode used at a constant potential drop of 0.5 V at all currents and maximum power rating of 100 mW. What resistance must be connected in series diode, so that current in circuit is maximum?