WorksheetsM4.1.1 Diodes Cat B1
Total questions: 24
Worksheet time: 17mins
Anode is _________ Polarity in diodes
Negative
Positive
Ground
Hot Side
What type of diode is this?
silicon
LED
Zener
Mylar
Diodes are categorised as?
Passive components
Active components
conductor
insulator
Main phenomenons associated with formation of p-n junctions are
Drift only
Diffusion only
Diffusion and Drift
only doping
The region on either side of the junction which becomes free from the mobile charge carriers is called
Energy gap region
Charge free region
Diffusion region
Depletion region
In the forward bias arrangement of a p-n junction diode,
the n-end is connected to the positive terminal of the battery
the p-end is connected to the positive terminal of the battery
the direction of current is from n-end to p-end in the diode
the p-end is connected to the negative terminal of the battery
During formation of p-n junction
an electron diffuses from n to p side
a hole diffuses from p to n side
a hole diffuses from n to p side
an electron diffuses from p to n side
Doping of Semiconductors
materials which can conduct electricity better than insulator, but not as well as conductors.
The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
when 4 electrons in outermost orbit.
The process of adding an impurity to an intrinsic semiconductor is called
Doping
Ionization
Recombination
Atomic modification
the figure A shows
forward bias
reverse bias
The figure B shows:
reverse bias
forward bias
the forward voltage drop across a silicon diode is about
0.7V
2.5V
3V
SCR is defined as ...............
Silicone Cup Rectifier
Supply Controlled Rectifier
Silicone Controlled Rectifier
Shorted Controlled Rectifier
Which is the symbol of SCR?
Terminals of SCR are ..........
Anode and Cathode
Collector, Base and Emitter
Anode, Cathode and Gate
Drain, Source and Gate
Which of the following is the basic construction of a SCR?
Which terminal does not belong to the SCR?
Anode
Gate
Base
Cathode
LED means
Light Emitting Display
Light Emitting Diode
Laser Emitting Display
Laser Emitting Diode
Symbol of LED
None of these
The colour of LED depends on
Colour of battery
Colour of Gas used in it
Semiconductor and doping material
What symbol is this?
LED
Photo diode
Zener diode
Diodes
Which wavelength of light does a photocell respond better too?
white light
infra red light
ultra violet light
what name is given to the small value of current flowing in a diode in the reverse bias?
Holding current
When testing a diode if the multimeter reads zero in both directions and an audio beep is heard then;
the diode has failed short circuit
the diode has failed open circuit
the diode is serviceable
