A p-type semiconductor is:
1.negatively charged
2.positively charged
3.uncharged
4.None of the these
Posted Date:-2021-12-17 04:31:50
Bonds in a semiconductor :
1.trivalent
2.covalent
3.bivalent
4.monovalent
Posted Date:-2021-12-17 04:35:28
Crystal diode is:
1.amplifying device
2.fluctuating device
3. non-linear device
4.linear device
Posted Date:-2021-12-17 04:33:14
Energy bands in solids are a consequence of:
1.Ohm’s Law
2.Pauli’s exclusion principle
3.Bohr’s theory
4.Heisenberg’s uncertainty principle
Posted Date:-2021-12-17 04:45:01
In a common base amplifier the phase difference between the input signal voltage and output voltage is :
1. π/2
2.0
3.π/4
4.π
Posted Date:-2021-12-17 04:44:09
In a p-type semiconductor, current conduction is by:
1.atoms
2.holes
3.electrons
4.protons
Posted Date:-2021-12-17 04:37:53
In binary system III represents:
1.1
2.3
3.7
4.100
Posted Date:-2021-12-17 04:46:43
In full wave rectifier, input a.c. current has a frequency v. The output frequency of current is :
1.V/2
2.V
3.2V
4.None
Posted Date:-2021-12-17 04:50:09
In intrinsic semiconductor at room temperature, the number of electrons and holes are:
1.equal
2.unequal
3.infinite
4.zero
Posted Date:-2021-12-17 04:49:04
In semi conductor which are responsible for conduction:
1.only electron
2.electron and hole both
3.only hole
4.None of the above
Posted Date:-2021-12-17 04:45:50
In semi conductor, at room temperature :
1.the valence bond is partially empty and the conduction band is partially filled
2.the valence bond is partially empty and the conduction band is partially filled
3. the valence band is completely filled
4.None of the above
Posted Date:-2021-12-17 04:55:49
In the middle of the depletion layer of a reverse biased p-n junction, the:
1.electric field is zero
2. potential is maximum
3.electric field is maximum
4.potential zero.
Posted Date:-2021-12-17 04:43:25
Main function of a transistor is to :
1.rectify
2.simplify
3.amplify
4.All the above
Posted Date:-2021-12-17 04:40:16
n reverse biasing:
1.large amount of current flows
2.no current flows
3.potential barrier across junction increases
4.depletion layer resistance increases
Posted Date:-2021-12-17 04:39:38
Number of electrons in the valence shell of a semiconductor is:
1.1
2.2
3.3
4.4
Posted Date:-2021-12-17 04:35:51
On applying reverse bias to a junction diode, it:
1.lowers the potential barrier
2. raise the potential barrier
3.increases the majority carrier current
4.increases the minority carrier current
Posted Date:-2021-12-17 04:41:51
On heating, resistance of semiconductors:
1.decreases
2.increases
3.remains same
4.first increases then decreases
Posted Date:-2021-12-17 04:47:30
p-n junction diode can be used as:
1.amplifier
2.oscillator
3.detector
4.modulator
Posted Date:-2021-12-17 04:48:20
Semiconductors of both p-type and n-type are produced by:
1.ionic solids
2.covalent solids
3.metallic solids
4.molecular solids
Posted Date:-2021-12-17 04:36:36
The material most commonly used to manufacture electronic solid state devices is :
1.copper
2.silicon
3.germanium
4.aluminium
Posted Date:-2021-12-17 04:31:04
The part of a transistor which is heavily doped to produce a large number of majority carriers is :
1. base
2.emitter
3.collector
4.None of the these
Posted Date:-2021-12-17 04:32:31
The relation between number of free electrons (n) in a semiconductor and temperature (T) is given by:
1.n ∝ T
2.n ∝ T²
3.n ∝ T1/2
4.n ∝ T3/2
Posted Date:-2021-12-17 04:38:54
To obtain electrons as majority charge carriers in a semiconductors the impurity mixed is:
1.monovalent
2.divalent
3.trivalent
4.pentavalent
Posted Date:-2021-12-17 04:42:30
To obtain p-type silicon semiconductor, we need to dope pure silicon with:
1.aluminium
2.phosphorus
3.oxygen
4.germanium
Posted Date:-2021-12-17 04:41:10
What is the number of possible crystal systems?
1.5
2.7
3.14
4.16
Posted Date:-2021-12-17 04:30:23
Winch of the following gate is not an universal gate?
1.OR
2.NOT
3.AND
4.NAND
Posted Date:-2021-12-17 04:52:14
With fall of temperature, the forbidden energy gap of a semiconductor
1.increases
2.decreases
3.sometimes increases and sometimes decreases
4.remains unchanged
Posted Date:-2021-12-17 04:37:15
Zener diode is used for:
1.Zener diode is used for:
2.amplification
3.stabilisation
4.rectification
Posted Date:-2021-12-17 04:53:17