120 VRMS www Select one: OA. 300 mA OB. 150 mA OC. 48.7 MA OD. 50 mA OE. 16.67 MA OF. 100 mA OG. 200 mA Vs If the secondary current is 50 mA, the primary current is

The value of po in a silicon semiconductor at T = 300K is 6.0 X 1015 cm-³. Determine EF - Ev EF-Ev= 0.183 eV EF - Ev = 0.179 eV EF - Ev = 0.071 eV EF - Ev = 0.193 eV

Light-emitting diodes (LEDs) are diodes made with III-V compound semiconductor materials such as aluminum gallium arsenide (AlGaAs), aluminum indium gallium phosphide (AllnGaP) or indium gallium nitride (InGaN), instead of silicon. The LEDs emit light when the device is operated under forward bias. LEDs of different colors have different turn-on voltages VD(on). For example: Color VD(on) Red ~ 1.6 V Yellow ~ 1.7 V (a) Model these five LEDs with a simplified piecewise linear model. (b) A rule of thumb is that it takes about 1 mA of current to "light" an LED while~ 10 mA is needed for it to appear bright. Use the piecewise linear model for the LEDs, for the over-voltage indicator circuit to the right, find the values of Vin which will cause D₁ or D₂ to light (i.e. when ID1 or ID2 exceeds 1 mA). Green ~ 1.8 V Blue ~ 2.8 V loks o mu Vin Red LED Red LED White ~ 3.8 V + lov 21 D₁ D2 -10V o t Vout 오

Find values of the intrinsic carrier concentration ni for silocon at 0C