Related InterviewSolutions

• The collector current for a transistor is `6.6mA`, and its current gains `alpha` is `0.95`. Determine `I_(B)` and `beta`
• The base current of a transistor is 0.105 mA and collector current is `2.05mA`. Determine the value of `beta, I_(e)` and `alpha` A change of `27muA` in the base current produces a change of 0.65 mA in the collector current. Find `beta_(a.c.)`.
• A crystal diode having internal resistance `200Omega` is used as a half rectifier. If the applied voltage is `V=50 sin omegat` volt and load resistance is `800Omega`, find (i) maximum output current (ii) d.c. output current (iii) d.c. output power and (iv) d.c. output voltage.
• Find the current through the circuit and the potential difference across the diode shown in fig. The drift current for the diode is `20muA`
• In the circuit shown in fig the base current `I_(B)=5.0muA`, base resistor `R_(B)=1.0MOmega` collector resistor `R_(c)=1.0kOmega` the collector current `I_(C)=5.0mA` and the d.c. voltage in the collect circuit `V_("CC")=6.0V`. (i) Can this circuit be used as an ampifier? (ii) What happens if the resistance `R_(C)` is `400Omega` and `I_(B), I_(C)` and `i_(C)` and `R_(B)` remain same as above?
• In a transistor circuit shown in fig, `R` has a resistance of `150kOmega, R_(L)` has a resistance of `750Omega`, and the direct current gain of the transistor is 80. Assuming ther is negligible potential difference between `B` and `E`, calculate (a) the base current rent `I_(B)` and (b) the potential difference betwen the collector and emitter.
• A sinusoidal voltage of rms value `220V` is applied to a diode and a resistor `R` in the circuit shown in fig. Show that half wave rectifaction occurs. If the diode is ideal, what is the rms voltage across?
• Find the equivalent resistnace of the circuit shown in fig between the points `A` and `B`
• As shown in fig an amplifier of no load gain 400 and input resistance `100Omega` is connected to external signal via a series resistance of `300Omega`. What is the apparent voltage gain?
• For a `CB` amplifier the input resistance is `800Omega` and the output resistance is `600 k Omega` (a) Determine the voltage gain if the emitter current is `12mA` and `alpha=0.97` (b) What is the power gain?