Question 219: Semiconductors and Logic Gates

Question

The circuit diagram used to study the characteristic curve of a zener diode is connected to variable power supply (0 $$-$$ 15 V) as shown in figure. A zener diode with maximum potential V
z
= 10 V and maximum power dissipation of 0.4 W is connected across a potential divider arrangement. The value of resistance R
P
connected in series with the zener diode to protect it from the damage is ________________ $$\Omega$$.

Accepted Answer

Power $\mathrm{P}_{\mathrm{zm}}=\mathrm{I}_{\mathrm{zm}} \mathrm{V}_{z}$
$$
\begin{aligned}
& \mathrm{I}_{\mathrm{ZM}}=\frac{P_{z M}}{V_{z}}=\frac{0.4}{10}=0.04 \mathrm{~A} \\
& 	ext { So, } R_{P}=\frac{E_{\max }-V_{z}}{I_{Z M}}=\frac{15-10}{0.04}=\frac{5}{0.04}=125 \Omega
\end{aligned}
$$

Semiconductors and Logic Gates

Integer / Numeric Answer Type