Electrical Eng. · Question Bank

Electromagnetics

350 questions · page 9 of 18. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
#161
The current of the electric circuit is analogous to which quantity of a magnetic circuit.
Ammf
Bflux
Cflux density
Dreluctivity
#162
The direction of force on a current carrying conductor placed in a magnetic field can be found by
Acork screw rule
Bfleming's left hand rule
Cfleming's right hand rule
Dusing a compass
#163
The emission of electrons from hot bodies is called
Aradiation effect
BEdison effect
Cskin effect
Dhall effect
#164
The energy gap for semiconductors made of silicon is
AEg = 5 eV
BEg = 1.1 eV
CEg = 0.67 eV
DEg = 4 eV
#165
The force between two magnetic poles is _____ their poles strength.
Aequal to
Bdirectly proportional to
Cinversely proportional to
Ddirectly proportional to the square root of
#166
The force between two magnetic poles is __________ permeability of the medium.
Adirectly proportional to the
Binversely proportional to the
Cnot dependent of the
Dexponentially proportional to the
#167
The greater percentage of materials are _____.
Adiamagnetic
Bparamagnetic
Cferromagnetic
Dnon-magnetic
#168
The greater the diameter of a wire, the ________ is the resistance.
Agreater
Blesser
Charder
Dbigger
#169
The magnetic field inside a solenoid
Ais zero
Bis uniform
Cincreases with distance from the axis
Ddecreases with distance from the axis
#170
The magnetic flux of 2000 lines is how many in maxwells?
A1000
B2000
C4000
D8000
#171
The magnitude of EMF that is induced when a conductor cuts magnetic flux is directly proportional to its rate.
AFaraday's first law
BFaraday's second law
CCoulomb's first law
DCoulomb's second law
#172
The magnitude of the induced emf in a coil is directly proportional to the ratio of the change of flux linkages. This is known as
AJoule's Law
BFaraday's second law of electromagnetic induction
CFaraday's first law of electromagnetic induction
DCoulomb's Law
#173
The mass of a proton is approximately
A1.\( 6726 \\times \(10^{-19}\) \) Kg
B1.\( 6726 \\times \(10^{-27}\) \) Kg
C1.\( 6022 \\times \(10^{-19}\) \) Kg
D1.\( 6022 \\times \(10^{-27}\) \) Kg
#174
The merging of a free electron and a hole inside the silicon crystal.
Acovalent bond
Brecombination
Cmerged electron
Dvalence bond
#175
The net movement of charged particles in one direction or another
Aflow
Bcurrent
Cdrift current
Ddiffusion current
#176
The property of a material which opposes the creation of a magnetic flux in it.
Aresistance
Breluctance
Cpermeance
Dconductance
#177
The reluctance of the magnetic circuit is _____ relative permeability of the material comprising the circuit.
Adirectly proportional to
Binversely proportional to
Cindependent of
Ddependent of
#178
The term used to refer to the vacancy left by the free electron when it departs from its original shell.
Aproton
Bhole
Cneutron
Dnucleus
#179
The unit of flux density is
AWb/m
Btesla
CAT/m
DN/Wb
#180
There are two mechanisms by which holes and electrons move through a silicon crystal. They are
Acovalent bond and recombination
Bdiffusion and drift
Cfree and charge particles
Dforward and reverse bias

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