The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
Magnetic effect
Magnetic phenomenon
Magnetic induction
Electromagnetic induction
Correct Answer :
C. Magnetic induction
Related Questions
The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force is known as
Retentivity
Reluctivity
Resistivity
Conductivity
At/m is a unit of
mmf
magnetic force
reluctance
magnetic flux density
The evaporation of electrons from a heated surface is called
Radiation
Convection
Thermionic emission
Conduction
Flux density is measured in
Tesia
Weber
Ampere- turn
Maxwell
A group of magnetically aligned atoms is called
Range
Lattice
Domain
Crystal
The magnetic field of a magnetized iron bar when strongly heated
Becomes weaker
Becomes stronger
Reverses in direction
is unchanged
The magnetic potential in a magnetic circuit can be measured in terms of
Mmf
Emf
Farad
Coulomb
Refers to the magnetic lines
Flux
Hysteresis
Current
Magnetomotive force
The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
Magnetic effect
Magnetic phenomenon
Magnetic induction
Electromagnetic induction
A substance that attracts pieces iron
Conductor
Semiconductor
Magnet
All of the above
The air space between poles of magnets
Air gap
Free space
Vacuum
Atmosphere
The B-H curve for ________ is a straight line passing through the origin.
cobalt
air
hardened steel
soft iron
Magnetic intensity is a
Phasor quantity
Physical quantity
Scalar quantity
Vector quantity
A magnetic material losses its ferromagnetic properties at a point called
Curie temperature
Inferred absolute temperature
Room temperature
Absolute temperature
Which of the following has the least number of valence electrons?
Conductor
Semiconductor
Insulator
Semi- insulator
Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of 300
3.78 x 10^4
3.78 x 10^-5
3.78 x 10^-3
3.78 x 10^-6
The B-H curve of ________ is not a straight line.
air
wood
silicon steel
soft iron
The phenomenon by which a subtracts pieces of iron
Magnetism
Electromagnetism
Naturalism
Materialism
An effect which is generally used in the gausameter to measure flux density.
Skin effect
Magnetic effect
Hall effect
Flywheel effect
The magnetic flux of 2000 lines is how many Maxwells?
Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons
North pole
South pole
Unit pole
Magnetic pole
The resistance of a material is ____________ its area of cross-section.
directly proportional
independent of
inversely proportional to
equal to
If the number of valence electrons of an atom is less than 4a then the substance is probably
a metal
an insulator
a non-metal
a semiconductor
Which of the following is used by temporary magnets as the magnetic material?
Hardened steel
Cobalt steel
Soft iron
Tungsten steel
The conduction of electricity across the surface of a dielectric is called
creepage
skin effect
surface effect
crosstalk
The net electrical charge in an isolated system remains constant. This is known as
Law of conservation of charge
Coulomb's first law
Coulomb's second law
Law of conservation of energy
The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
increases
decreases
remains the same
becomes negative
What is used as the insulating material or dielectric in an electric ion
Oiled paper
Mica
Paraffin
Tit anate compound
Used to maintain strength of magnetic field
Container
Air gap
Keeper
S ource
States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.
Wien's displacement law
Hartleys law
Hall's law
Wiedemann Franz law