If the distance between two magnetic poles decreases by 2 times, the force between them
Adecreases two times
Bincreases four times
Cincreases two times
Ddecreases four times
#142
If the solenoid is gripped by the right hand with the fingers pointing to the direction of the current flow, the outstretched thumb will then point the north pole. This is known as
Aright hand rule
Bhelix rule
Cend rule
Dcork screw rule
#143
If two coils are close enough together for their magnetic fields to interact, a change in current in one will induce a corresponding voltage in the other. This condition is known as
Aself inductance
Bmutual inductance
Ccrossfire inductance
Dlinked inductance
#144
Ion is ____________?
Anucleus without protons
Ban atom with unbalanced charges
Cproton
Dfree electron
#145
Isotope means, the same element but with different number of
Aelectrons
Bneutrons
Cprotons
Datoms
#146
Materials that might have eight valence electrons
Aconductor
Binsulator
Csemiconductor
Dsemi-insulator
#147
Most materials' relative permittivity lies between
A0.01 - 1
B1 - 10
C10 - 50
D50 - 100
#148
One ampere-turn is equivalent to _____ gilberts.
A1.16
B1.26
C1.36
D1.46
#149
One that has magnetic poles produced by internal atomic structure with no external current necessary
Adiamagnetic
Bpermanent magnet
Cparamagnetic
Delectromagnetic
#150
Particles of zero charge and zero mass.
Afusion
Bneutrinos
Cfission
Disotopes
#151
Referred to as the specific reluctance of a material.
Aresistivity
Breluctivity
Cconductivity
Dpermeability
#152
Refers to the lowest voltage across any insulator that can cause current flow.
Aconduction voltage
Bbreakdown voltage
Cvoltage flow
Dvoltage drop
#153
Refers to the temperature of the surrounding air.
Aatmospheric temperature
Bambient temperature
Cfreezing point
Dcooling temperature
#154
Residual magnetism refers to the flux density, which exists in the iron core when the magnetic field intensity is
Aminimized
Breduced to zero
Cmaximize
Dunity
#155
Temporary magnets are commonly employed in
Aelectric instruments
Bmotors
Cmoving coil loudspeakers
Dmagnetos
#156
The B-H curve for _____ is a straight line passing through the origin.
Acobalt
Bair
Chardened steel
Dsoft iron
#157
The area of a conductor whose diameter is 0.001 inch is equal to
Aone angstrom
Bone circular mil
Cone micron
Done steradian
#158
The branch of engineering which deals with the magnetic field of electric current is known as
Amagnetism
Belectromagnetism
Celectrical engineering
Delectronics engineering
#159
The capacity of a substance to become magnetized. This is expressed as a ratio between the magnetization produced in a substance to the magnetizing force producing it.
Amagnetic conductivity
Bmagnetic susceptibility
Cmagnetic resistivity
Dmagnetic reluctivity
#160
The contribution to the ionization in an ionization chamber by electrons liberated from the walls.