how to find hfe of transistor?
241926
hFE = Ic/Ib where hFE = gain, Ic = collector current (amps) Ib = base current (amps) Example: A transistor has a current of 0.5 amps flowing through the collector and 0.02 amps though the base.
922039
There are two most common transistor types today: the Metal -Oxide - Semiconductor or MOS and the Bipolar Junction Transistor or BJT. The MOS is also designated as MOSFET because it is a field effect transistor (FET).
113871
['The number of protons in the nucleus of the atom is equal to the atomic number (Z).', 'The number of electrons in a neutral atom is equal to the number of protons.']
876863
['Front Component Speakers - High-Pass Filter = 80 Hz (12 db or 24 db Slope)', 'Subwoofer(s) - Low-Pass Filter = 80 Hz (12 db or 24 db Slope)']
1053802
['S(kVA) = √3 × I(A) × VL-L(V) / 1000.', 'So kilovolt-amps are equal to √3 times amps times volts divided by 1000.', 'kilovolt-amps = √3 × amps × volts / 1000.', 'kVA = √3 × A ⋅ V / 1000.', 'S = √3 × 12A × 190V / 1000 = 3.949kVA.']
590212
['E = emissions;', 'A = activity rate;', 'EF = emission factor, and.', 'ER =overall emission reduction efficiency, %']
480792
Hook the positive lead from the multimeter to the to the BASE (B) of the transistor. Hook the negative meter lead to the EMITTER (E) of the transistor. For an good NPN transistor, the meter should show a voltage drop between 0.45V and 0.9V. If you are testing PNP transistor, you should see “OL” (Over Limit).
272330
['Find the Thevenin Resistance by removing all voltage sources and load resistor.', 'Find the Thevenin Voltage by plugging in the voltages.', 'Use the Thevenin Resistance and Voltage to find the current flowing through the load.']
1021023
The back emf is calculated based on the difference between the supplied voltage and the loss from the current through the resistance. The power from each device is calculated from one of the power formulas based on the given information. The back emf is ϵi=ϵS−I(Rf+REa)=120V−(10A)(2.0Ω)=100.
935265
['High voltage gain.', 'Low current gain.', 'Low power gain.', 'Input and output phase relation is 0o.', 'It has low input impedance.', 'It has high output impedance.']
453393
['Iron deficit - equation derivation1 :', 'Assumptions: -Blood volume = 65 mL/kg. -Hgb conc target =14.0 g/dL. ... ', 'Intermediate calculations: -Blood volume (dL) = [65 (mL/kg) x body weight (kg)] / 100 (mL/dL) ... ', 'Final calculations: -Hgb iron deficit (mg) = weight (kg) x (14 - Hgb) x (2.145)']
1271568
Another example: Iron, which is 26 Fe 56. It has 26 protons, 26 electrons, and 56-26=30 neutrons.
66528
['number of protons = atomic number.', 'number of electrons = atomic number.', 'number of neutrons = mass number - atomic number.']
145616
1 Answer. There is no particular formulae but the resistance using the color codes is like R= [(numbers) × (multiplier) ± (tolerance (%) )].
188377
In First Small Signal Equivalent Model of MOSFET, I have found out Vgs = Vg= (Vin R1//R2)/(Rg+R1//R2), because R1//R2 parallel with the Vin and Rg. Using Voltage divider, I found Vgs=Vg=(Vin R1//R2)/(Rg+R1//R2).
819471
Alpha of a transistor is the current gain in common base configuration defined as the ratio of change in collector current to change in emitter current while beta is the current gain in CE configuration. It is defined as the change in collector current to base current.
18070
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm's Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.