Font size
WorksheetsBASIC ELECTRONICS QUIZ 2
Total questions: 20
Worksheet time: 11mins
Bridge rectifier is an alternative for
Full wave rectifier
Peak rectifier
Half wave rectifier
None of the mentioned
Which of the following is true for a bridge rectifier?
The peak inverse voltage or PIV for the bridge rectifier is lower when compared to an identical center tapped rectifier
The output voltage for the center tapped rectifier is lower than the identical bridge rectifier
A transistor of higher number of coil is required for center tapped rectifier than the identical bridge rectifier
All of the mentioned
For full-wave rectified sine wave, mean value is
0.70 im
0.636 im
0.5 im
0.318 lm.
For full-wave rectified sine wave, form factor is
1.5
1.41
1.28
1.11
For a half wave or full wave rectifier the Peak Inverse Voltage of the rectifier is always
Greater than the input voltage
Smaller than the input voltage
Equal to the input voltage
Greater than the input voltage for full wave rectifier and smaller for the half wave rectifier
The ripple factor of a full-wave rectifier circuit compared to that of a half wave rectifier circuit without filter is
half of that for a half 'wave rectifier
less than half that for a half-wave rectifier circuit
equal to that of a half wave rectifier
none of the above
A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as a DC source.To overcome this one can use
A capacitor in series with a the load resistance
A capacitor in parallel to the load resistance
Both of the mentioned situations will work
None of the mentioned situations will work
Photodiode is used in the detection of
Visible light
Invisible light
No light
Both visible and invisible light
In a photodiode, when there is no incident light, the reverse current is almost negligible and is called
Zener current
Dark current
Photocurrent
PIN current
A photo-diode is normally
Forward biased
Reverse biased
Neither forward biased nor reverse biased
Emitting light
When the light increases, the minority carrier current in a potodiode
Decreases
Increases
Unaffected
Reverses distortion
To display the digit 8 in a seven-segment indicator
C must be lighted
G must be off
F must be on
All segment must be on
LED is usually made of materials like
GaAs
GaP
GaAsP
None of the above
All of the above
Light Emitting diode is
Forward biased
Reverse biased
Both forward and reverse
None of the above
Which process of the Electron-hole pair is responsible for emitting of light?
Generation
Movement
Recombination
Diffusion
The colour of emitted light from LED depends on
Construction of LED, that is physical dimensions
Number of available carriers
Type of semiconductor material used
Number of recombinations taking place
The advantage of LED is
Long life
Fast on-off switching
Low operating voltage
All of the above
The LEDs made with GaAs emit light in the
Yellow region
Infrared region
Orange region
Red visible region
Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an external circuit,……….. to the incident power. The light is absorbed ……….with distance and is ………..to the absorption coefficient.
Proportional, exponentially, proportional
Proportional, logarithmically, inversely proportional
Inversely proportional, exponentially, unrelated
Compared to a photo-diode, which of the listed advantages and disadvantages would be expected of a phototransistor
Faster response and greater sensitivity
Faster response and less sensitivity
Slower response and greater sensitivity
Slower response and less sensitivity
