
Electrostatics and Semiconductors
Authored by Param Parekh
Physics, Science
10th - 12th Grade
Used 5+ times

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18 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If Np and Ne be the number of holes and electrons for conduction in an extrinsic semiconductor, then _
Np>Ne
Np<Ne
Np=Ne
Depends on the nature of dopant
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Energy bands in solids are a consequence of _____.
Heisenberg's Uncertainty Principle
Einstein's Photoelectric effect
Pauli's Exclusion Principle
Avogadro's Hypothesis
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
n number of electric fields are acting on a point P located in 3-dimensional space.The resultant electric field 'E' is given by __.
Geometric mean of individual electric fields
Vector sum of individual electric fields
Harmonic mean of individual electric fields
Algebraic sum of individual electric fields
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Two point charges +3 μC and +8 μC repel each other with a force of 40 N. If a charge of -5 μC is added to each of them, then the force between them will become
-10 N
+10N
+20N
None of these
5.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The total Flux for the surface of the cylinder is given by
2 π R²E
π R²/E
( π R²/ π R)/ E
Zero
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ABC is an equilateral triangle. Charged +q are placed at each corner. The electric field intensity at O will be
__1__q__
4 πε0 r²
q/(4 π ε0 r)
Zero
3q/(4 π ε0 r²)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A proton and an electron are placed in a uniform electric field
The electric forces acting on them will be equal
The magnitude of the forces will be equal
Their accelerations will be equal
The magnitude of their accelerations will be equal
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