The magnetic field inside a solenoid
is zero
is uniform
increases with distance from the axis
decreases with distance from the axis
Correct Answer :
B. is uniform
Related Questions
Electric field intensity at a point is numerically equal to ________ at that point.
potential gradient
potential difference
dielectric constant
the force
What is the SI unit of magnetic flux?
Tesla
Weber
Maxwell
Gauss
Defined as the number of lines per unit area through any substance in a plane at right angles to the lines of force
Flux
Flux lines
Flux density
Flux intensity
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
One oersted (Oe) is equivalent to _____ Gb/cm.
The customary energy unit in atomic and nuclear physics is
Joule
Volt- coulomb
electron-volt
Walt- second
Which of the following is a natural magnet?
Steel
Magnesia
Lodestone
S oft iron
The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization when subjected to a dc magnetic field.
Wartheim effect
Wiedemann effect
Wiegand effect
Edison effect
The magnetic field of a magnetized iron bar when strongly heated
Becomes weaker
Becomes stronger
Reverses in direction
is unchanged
Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions
Ionic bond
Covalent Bond
Electrostatic Bond
Metallic bond
The permittivity of a material is given by one of the following formulas.
DE
E/D
D^2/E
D/E
The current of electric circuit is analogous to which quantity of a m
Mmf
Flux
Flux density
R eluctivity
The uncharged particles which have no effect on its atomic charge.
Nucleons
Electrons
Protons
Neutrons
The force acting on a unit n- pole placed at that point is called
Magnetic field intensity
Electric field intensity
Electromagnetic field intensity
Intensity magnetization
Which of the following has the least number of valence electrons?
Conductor
Semiconductor
Insulator
Semi- insulator
The force between two magnetic poles is _____ the relative permeability of the medium.
directly proportional to
independent of
inversely proportional to
equal to
Which element has four valence electrons?
Conductor
Insulator
Semiconductor
Semi- insulator
Two similar polesa each 1Wba placed 1 m apart in air will experience a repulsive force of
63000 N
63 × 10^-3 N
8 × 10^12 N
796 kN
The unit of flux is _____ in cgs system.
Tesia
Gilbert
Maxwell
Oersted
The force between two charges placed a given distance apart ______ as the relative permittivity of the medium is increased.
increases
decreases
remains unchanged
becomes infinite
As the magnetic intensity decreasesa the relative permeability of a magnetic material
decreases
remains the same
increases
becomes zero
One that has magnetic poles produced by internal atomic structure with no external current necessary
Diamagnetic
Permanent magnets
Paramagnetic
Electromagnetic
The quantity 10^6 maxwells is equivalent to one
Weber
Gauss
Gilbert
Tesla
The energy stored in an electrostatic field or electromagnetic field is called
Electromagnetic energy
Kinetic energy
Potential energy
R est energy
Small voltages generated by a conductor with current in an external magnetic field.
Skin effect
Magnetic effect
Hall effect
Flywheel Effect
Which of the following is a vector quantity?
Magnetic potential
Magnetic field intensity
Magnetic permeability
F lux density
What is the usual value of leakage coefficient for electrical machines?
0.5 to 1
1 to 5
5 to 10
1.15 to 1.25
An atom or a group of atoms that carries a net electric charge.
Positive ion
Negative ion
Ion
Electron
Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.
Ionic bond
Covalent bond
Metallic bond
Van der Waals bond
How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
6000 turns
600 turns
167 turns
67turns