A principle that states that only two electrons with different spins are allowed to exist in a given orbit
Bohr's principle
Pauli exclusion principle
Avogadro's principle
Coulomb's principle
Correct Answer :
B. Pauli exclusion principle
Related Questions
What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
Materials whose permeabilities are slightly greater than that of free space
Paramagnetic
Non- magnetic
Ferromagnetic
Diamagnetic
The temperature coefficient of resistance of insulators is
zero
negative
positive
infinite
What is the SI unit of reluctance?
At
At/m
N/Wb
At/Wb
The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force is called
Leftover magnetism
Hysteresis
Residual magnetism
Coercivity
______ is an electromagnet with its core in the form of a close magnetic ring.
S olenoid
Paraboloid
Toroid
Cycloid
A one cubic cm of copper has how many free electrons at room temperature?
80 × 10^18
8.5 × 10^22
20 × 10^10
50 × 10^20
How many electrons are needed in the valence orbit to give a material's stability?
A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
5 Wb
0.5 Tesia of flux density
5x 10^-5 Wb of flux
5000 Tesia of flux density
All magnetic field originates from
moving electric charge
Iron atoms
Magnetic domain
Permanent magnets
The B-H curve of ________ is not a straight line.
air
wood
silicon steel
soft iron
The magnetic flux of 2000 lines is how many Maxwells?
Materials that have very high permeabilities (hundreds and even thousands times of that of free space)
Paramagnetic
Non- magnetic
Ferromagnetic
Diamagnetic
Under ordinary conditionsa a body is considered
positively charged
neutral
negatively charged
stable
Hydrogen is an example of a _____ material.
Paramagnetic
Diamagnetic
Ferromagnetic
N on- magnetic
A negatively charge body has
deficit of electrons
excess of protons
excess of electrons
deficit of neutrons
The evaporation of electrons from a heated surface is called
Radiation
Convection
Thermionic emission
Conduction
An electron- volt (eV) is a unit of
Energy
Potential difference
Charge
Momentum
What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring atoms or ions?
Crystalline
Amorphous
Polycrystalline
Poly amorphous
The property of a material which opposes the creation of magnetic flux in it
Resistance
Reluctance
Permeance
Conductance
What is the unit of magnetomotive force?
Volt
Tesla
Ampere- turn
Weber
Permeance is analogous to
Conductance
Reluctance
Admittance
Resistance
Refers to the magnetic lines
Flux
Hysteresis
Current
Magnetomotive force
What is the typical saturation flux density for most magnetic materials?
4 Wb/m^2
5 Wb/m^2
1 Wb/m^2
2 Wb/m^2
The tiniest element of matter
Atom
Proton
Electron
Neutron
Which of the following is a diamagnetic material?
Aluminum
Silver
Air
Cobalt
The B-H curve for ________ is a straight line passing through the origin.
cobalt
air
hardened steel
soft iron
The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called
Magnetic field
Electric field
Electromagnetic field
Free Space Field
When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
Greatly decreased
Greatly increased
Slightly decreased
Slightly increased
The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
Skin effect
Walt effect
Hall effect
Edison effect