In p-type substances, the minority carriers are:
In p-type substances, the minority carriers are:
Protons | |
Electrons | |
Neutrons | |
Holes |
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A pentavelent impurity is:
A pentavelent impurity is:
Alumimium | |
Phosphorous | |
Indium | |
Boron |
Which one pair belongs to accepter impurity?
Which one pair belongs to accepter impurity?
Antimony, indium | |
Boron, gallium | |
Aresenic antimony | |
Aresinci, phosphorus |
Which one is pentavanlent impurity?
Which one is pentavanlent impurity?
Indium | |
Gallium | |
Boron | |
Antimony |
Donor impurities are:
Donor impurities are:
Indium, galium | |
Antimony, arsenic | |
Germanium, silicon | |
Diamond, carbon |
In “N” type material, the minority charge carriers are:
In “N” type material, the minority charge carriers are:
Holes | |
Free electrons | |
Portons | |
Mesons |
Which type of impurity is to be added to a pure semi-conductor crystal to provide holes?
Which type of impurity is to be added to a pure semi-conductor crystal to provide holes?
Pentavalent | |
Tetravalent | |
Trivalent | |
Monovalent |
To get N-type, the Ge is doped with:
To get N-type, the Ge is doped with:
Arsenic | |
Boron | |
Aluminium | |
Indium |
The ratio of adding impurity in a semi conductor is:
The ratio of adding impurity in a semi conductor is:
1 to 104 | |
1 to 105 | |
1 to 106 | |
1 to 103 |
Good conductors have conductivities of the order of:
Good conductors have conductivities of the order of:
102(?m)-1 | |
10-7(?m)-1 | |
10-2(?m)-1 | |
107(?m)-1 |
Insulators have conductivity ranging between:
Insulators have conductivity ranging between:
10-4to10+4(?m)-1 | |
10-8to10-4(?m)-1 | |
10-10to10-1(?m)-1 | |
104to108(?m)-1 |
Conductors have conductivities of the order of:
Conductors have conductivities of the order of:
107(?m)-1 | |
105(?m)-1 | |
109(?m)-1 | |
103(?m)-1 |
Glass and High Steel Carbon are example of:
Glass and High Steel Carbon are example of:
Hard substances | |
Soft substances | |
Ductile substances | |
Brittle substances |
Out of the following which material is brittle:
Out of the following which material is brittle:
Tungsten | |
High steel carbon | |
Wrought iron | |
Copper |
Which one of the following is ductile substance?
Which one of the following is ductile substance?
Wrought iron | |
Lead | |
Copper | |
All of them |
The ability of a body to return to its original shape is called:
The ability of a body to return to its original shape is called:
Strain | |
Stress | |
Elasticity | |
Plasticity |
The young’s modulus of steel is:
The young’s modulus of steel is:
1.5×109Nm?2 | |
3.9×109Nm?2 | |
2×1011Nm?2 | |
2×109Nm?2 |
Young’s modulus for water’s is:
Young’s modulus for water’s is:
1 | |
Zero | |
3 | |
2 |
The SI unit of stress is same as that of:
The SI unit of stress is same as that of:
Work | |
Momentum | |
Force | |
Pressure |
The particles which do not experience strong force are called:
The particles which do not experience strong force are called:
Mesons | |
Leptons | |
Hadrons | |
Baryons |