Q.1
Power diodes are generally
Q.2
Silicon is not suitable for fabrication of light emitting diodes because it is
Q.3
In a bipolar transistor, the base collector junction has
Q.4
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.
Q.5
The output, V-I characteristics of an Enhancement type MOSFET has
Q.6
If too large current passes through the diode
Q.7
Which of the following has highest resistivity?
Q.8
At room temperature the current in an intrinsic semiconductor is due to
Q.9
The sensitivity of human eyes is maximum at
Q.10
Which of the following could be the maximum current rating of junction diode by 126?
Q.11
Assertion (A): In p-n-p transistor collector current is termed negative.
Reason (R): In p-n-p transistor holes are majority carriers.
Q.12
How many free electrons does a p type semiconductor has?
Q.13
When avalanche breakdown occurs covalent bonds are not affected.
Q.14
Which variety of copper has the best conductivity?
Q.15
What is the necessary a.c. input power from the transformer secondary used in a half wave rectifier to deliver 500 W of d.c. power to the load?
Q.16
A thermistor is a
Q.17
Piezoelectric quartz crystal resonators find application where
Q.18
Light dependent resistors are
Q.19
In a bipolar transistor, the emitter base junction has
Q.20
Free electrons exist in
0 h : 0 m : 1 s