Q.1.
Zener diode are used as voltage regulator
Q.2.
Is the element added to the type p semiconductors.
Q.3.
A diode made of GaAs emits dark ....... light
Q.4.
Optocouplers are available in Integrated circuit form
Q.5.
A photodiode is used in ................... mode
Q.6.
The reference level of a signal can be changed by using ........
Q.7.
In solar cell the short circuit current .......with light intensity
Q.8.
A device that converts the energy of light directly into electrical energy is
Q.9.
An optocoupler is used as
Q.10.
Colour of the LED output light is decided by
Q.11.
Semiconductor are substances whose electrical conductivity lies between that of
Q.12.
A diode is used as rectifier to convert
Q.13.
When the diode is operated in forward bias mode
Q.14.
A pn junction diode which has a sharp breakdown voltage is known as
Q.15.
Zener diodes are mostly used in
Q.16.
Current limiting resistance value used in series with LED is normally between
Q.17.
The silver ring marked on diode indicates
Q.18.
What does the diode do?
Q.19.
What we have inside of a charger?
Q.20.
Why do we need a transformer in the charger?