A silicon sample 'A' is doped with 10¹⁸ atoms/cm³ of Boron. Another sample 'B' of identical dimensions is doped with 10¹⁸ atoms/cm³ of Phosphorus. The ratio of electron to hole mobility is 1/3. The ratio of conductivity of the sample A to B is

A Silicon PN junction diode under reverse bias has depletion region of width 10 µm. The relative permittivity of Silicon, ɛ_r = 11.7 and the permittivity of free space ɛ₀ = 8.854 × 10^-12 F/m.The depletion capacitance of the diode per square meter is

The Zener diode in the regulator circuit shown in figure has a Zener voltage of 5.8 Volts and a Zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 Volts, is

A MOS capacitor made using p-type substrate is in the accumulation mode. The dominant charge in the channel is due to the presence of