Q. When plate voltage in diode valve is increased from $100\ volt$ to $150\ volt$ then plate current increases from $7.5\ mA$ to $12\ mA$. The dynamic plate resistance will be
A) $10\ k\Omega$
B) $11\ k\Omega$
C) $15\ k\Omega$
D) $11.1\ k\Omega$
Explanation
(d) $r_{p} = \frac{\Delta V_{p}}{\Delta i_{p}} = \frac{150 - 100}{(12 - 7.5) \times 10^{- 3}} = \frac{50}{4.5} \times 10^{3} = 11.1k\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.