MCQ Bank
Power supplies are used for converting
- A) DC energy to DC energy.
- B) AC energy to DC energy
- C) AC energy to AC energy.
- D) clipping waveforms
For secondary turns of 10 and primary turns of 20, turn ratio is
- A) 10:10
- B) 10:20
- C) 20:20
- D) 20:10
Analysing the farward biase region of junction diode , the value of constant voltage,VT is
- A) 25.02V
- B) 25.02mV
- C) 10mV
- D) 5Mv
A transformer is used for
- A) both ac and dc voltage
- B) ac voltage
- C) none of these
- D) dc voltage
The Q- point on load line is the ..................of the circuit
- A) melting point
- B) zero point
- C) operating point
- D) non operating point
For reverse biased condition of P-N junction
- A) +Ve polarity to P electrode and -Ve polarity to N electrode
- B) +Ve polarity to N electrode and -Ve polarity to P electrode
- C) +Ve polarity to both N electrode and P electrode
- D) -Ve polarity to both N electrode and P electrode
If turn ratio of a transformer is 5 and secondary current is 2A, the primary current is
- A) 0.4A
- B) 10A
- C) 7A
- D) 2.5A
For I-V curve of a diode, a changing current from 20mA to 10 mA and voltage from 0.72v to 0.78v , cause AC resistance of value
- A) 8 ohms
- B) 1.66 ohms
- C) none of these
- D) 6 ohms
For a series circuit of a resistance, voltage source and diode in farward biased, we have
- A) VS=VF/4
- B) VS=VR+VF
- C) VS=VR
- D) VR=VS+VF
If ideal diode in a simple circuit is in reversed biased condition
- A) current (I)=o
- B) all of these
- C) it will act as an open circuit
- D) no current will flow
A transformer has turn ratio 5 and secondary voltage is 10v, the primary voltage is
- A) 100
- B) 25v
- C) 0.5v
- D) 2v
Small signal model of diode is related to
- A) only ac signal
- B) neither ac nor dc
- C) both AC and DC signal
- D) only dc voltage
Using exponential model,for a diode that conducts at 1mA with n=2, the change in current due to change of voltage by 5mv will be
- A) 0.8mA
- B) 0.4mA
- C) 3mA
- D) 0.11mA
For the given germinium diode and resistance circuit, the voltage drop across the resistance is 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
- A) 6V
- B) 5.3V
- C) 10V
- D) 4.7V
Depletion region exists on ................sides of a P-N junction.
- A) Both sides
- B) N- side
- C) in middle of P- side
- D) P- side
A transformer may consists of
- A) no winding
- B) two windings
- C) two or more than two windings
- D) one winding
The barrier voltage for a silicon diode is approximately
- A) 0.3 v
- B) 0.7 v
- C) 5 v
- D) 2 v
The charactistics of ideal diode when farward biased (close switch) are
- A) diode will have no voltage drop across its terminals
- B) all of these
- C) Diode will have no resistance
- D) diode will have maximum current flow
The primary and secondary winding of transformer are
- A) largely separated
- B) physically touched
- C) touched with conductor
- D) physically isolated
When ideal diode acting as short circuit
- A) no current flows
- B) V is half of applied voltage
- C) V is maximum
- D) V=0