In a bipolar transistor, the base collector junction has
In a bipolar transistor, the base collector junction has
An electron in the conduction band
An electron in the conduction band
At room temperature the current in an intrinsic semiconductor is due to
At room temperature the current in an intrinsic semiconductor is due to
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?
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?
Piezoelectric quartz crystal resonators find application where
Piezoelectric quartz crystal resonators find application where
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
Which of the following has highest resistivity?
Which of the following has highest resistivity?
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.
The sensitivity of human eyes is maximum at
The sensitivity of human eyes is maximum at
Assertion (A): In p-n-p transistor collector current is termed negative.
Reason (R): In p-n-p transistor holes are majority carriers.
Assertion (A): In p-n-p transistor collector current is termed negative.
Reason (R): In p-n-p transistor holes are majority carriers.
If too large current passes through the diode
If too large current passes through the diode
Which variety of copper has the best conductivity?
Which variety of copper has the best conductivity?
As compared to bipolar junction transistor, a FET
As compared to bipolar junction transistor, a FET
When diodes are connected in series to increase voltage rating the peak inverse voltage per junction
When diodes are connected in series to increase voltage rating the peak inverse voltage per junction
How many free electrons does a p type semiconductor has?
How many free electrons does a p type semiconductor has?
In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
An intrinsic silicon sample has 1 million free electrons at room temperature. As the temperature is increased
An intrinsic silicon sample has 1 million free electrons at room temperature. As the temperature is increased
A thermistor is a
A thermistor is a
Assertion (A): A p-n junction has high resistance in reverse direction.
Reason (R): When a reverse bias is applied to p-n junction, the width of depletion layer increases.
Assertion (A): A p-n junction has high resistance in reverse direction.
Reason (R): When a reverse bias is applied to p-n junction, the width of depletion layer increases.
Fermi level is the amount of energy in which
Fermi level is the amount of energy in which
For a P-N diode, the number of minority carriers crossing the junction depends on
For a P-N diode, the number of minority carriers crossing the junction depends on
In the sale of diamonds the unit of weight is carat. One carat is equal to
In the sale of diamonds the unit of weight is carat. One carat is equal to
Which of the following could be the maximum current rating of junction diode by 126?
Which of the following could be the maximum current rating of junction diode by 126?
The depletion layer width of Junction
The depletion layer width of Junction
In monolithic ICs, all the components are fabricated by
In monolithic ICs, all the components are fabricated by
The dynamic resistance of a forward biased p-n diode
The dynamic resistance of a forward biased p-n diode
The most commonly used semiconductor material is
The most commonly used semiconductor material is
Silicon is not suitable for fabrication of light emitting diodes because it is
Silicon is not suitable for fabrication of light emitting diodes because it is
Forbidden energy gap in germanium at 0 K is about
Forbidden energy gap in germanium at 0 K is about
The amount of photoelectric emission current depends on
The amount of photoelectric emission current depends on
The output, V-I characteristics of an Enhancement type MOSFET has
The output, V-I characteristics of an Enhancement type MOSFET has
In a bipolar transistor, the emitter base junction has
In a bipolar transistor, the emitter base junction has
Each cell of a static Random Access memory contains
Each cell of a static Random Access memory contains
The forbidden energy gap between the valence band and conduction band will be least in case of
The forbidden energy gap between the valence band and conduction band will be least in case of
Free electrons exist in
Free electrons exist in
Power diodes are generally
Power diodes are generally
Assertion (A): A VMOS can handle much larger current than other field effect transistors.
Reason (R): In a VMOS the conducting channel is very narrow.
Assertion (A): A VMOS can handle much larger current than other field effect transistors.
Reason (R): In a VMOS the conducting channel is very narrow.
In which of these is reverse recovery time nearly zero?
In which of these is reverse recovery time nearly zero?
For a NPN bipolar transistor, what is the main stream of current in the base region?
For a NPN bipolar transistor, what is the main stream of current in the base region?
When avalanche breakdown occurs covalent bonds are not affected.
When avalanche breakdown occurs covalent bonds are not affected.
In a half wave rectifier, the load current flows
In a half wave rectifier, the load current flows
In a semiconductor diode, the barrier offers opposition to
In a semiconductor diode, the barrier offers opposition to
Which one of the following is not a characteristic of a ferroelectric material?
Which one of the following is not a characteristic of a ferroelectric material?
Permalloy is
Permalloy is
Light dependent resistors are
Light dependent resistors are
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is
Assertion (A): A JFET can be used as a current source.
Reason (R): In beyond pinch off region the current in JFET is nearly constant.
Assertion (A): A JFET can be used as a current source.
Reason (R): In beyond pinch off region the current in JFET is nearly constant.
The sensitivity of human eyes is maximum at
The sensitivity of human eyes is maximum at
