What is the measure of the density and sign of the electric charge at a point relative to that at some time?
Electric potential
Electric charge
Electric current
Electric intensity
Correct Answer :
A. Electric potential
Related Questions
Core materials of a good relay have _________ hysteresis loop.
large
narrow
very large
very narrow
The simplest type of atom to exist is the ______ atom.
Helium
Hydrogen
Boron
Oxygen
Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying conductors can attract and repel each other just like magnets?
Luigi Galvani
Hans Christian Oersted
Charles Coulomb
Andre Ampere
Flux density is measured in
Tesia
Weber
Ampere- turn
Maxwell
Permeance of a magnetic circuit is _________ the cross-sectional area of the circuit.
directly proportional to
inversely proportional to
dependent of
independent of
Gases whose particles are charged are known as
Conductors
Insulators
Gaseous Conductors
Plasma
The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as
Hall effect
Grounding
Shielding
Limiting
What is the SI unit of specific resistance or resistivity?
Ohm-circular mil per inch
Ohm-circular mil per foot
Ohm-m
Ohm-cm
The relative permeability of a magnetic material is 10^5. What is its permeability?
4 × 10^5 H/m
4 × 10^-12 H/m
4× 10^-2 H/m
4 × 10^7H/m
Amorphous solid is also called
Crystalline
Non- crystalline
Polycrystalline
Homogenous
Which of the following is a diamagnetic material?
Aluminum
Silver
Air
Cobalt
Lenz's law is the consequence of the law of conservation of
Energy
Charge
Field lines
Momentum
Who demonstrated the theory of electromagnetic induction in 1831?
Michael Faraday
Andre Ampere
James Clerk Maxwell
Charles Coulomb
Magnetic fields do not interact with
Moving permanent magnets
Stationary permanent magnets
Moving electric charges
Stationary electric charges
The current of electric circuit is analogous to which quantity of a m
Mmf
Flux
Flux density
R eluctivity
The science of adapting electronics to aerospace flight.
Avionics
Aerotronics
Aerodynamics
Astrionics
The unit of flux is _____ in cgs system.
Tesia
Gilbert
Maxwell
Oersted
Magnetic effects of the earth as a huge magnet with north and south poles.
Diamagnetic
Ferromagnetic
Terrestrial magnetism
Terrestrial ferromagnetism
The force which set ups or tends to set up magnetic flux in a magnetic circuit
Dynamic force
Electromotive force
Potential difference
Magnetomotive force
The reluctance of a magnetic circuit varies with
length × area
area � length
length � area
length + area
What is the cgs unit of magnetomotive force?
Gilbert
Ampere- turn
Maxwell
Weber
One electron volt (1 eV) is equivalent to _____ joules
1.3 x 10^-19
1.4 x 10^-19
1.5 x 10^-19
1.6 x 10^-19
Defined as the flux density produced in it due to its own induced magnetism
Magnetic field intensity
Electric field intensity
Electromagnetic field intensity
Intensity magnetization
All magnetic field originates from
moving electric charge
Iron atoms
Magnetic domain
Permanent magnets
What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two or more electrons?
Ionic
Covalent
Metallic
Van der Waals
Germanium atom has ______ protons and ______ electrons.
32, 32
32, 42
42, 32
34, 34
The magnetic flux through a wire loop in a magnetic field does not d
T he area of the loop
The magnitude of the field
The shape of the loop
The angle between the plane of the loop and the direction
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
The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be
63 V
21 V
7 V
42 V
The K shell or the first shell has how many permissible number of orbiting electrons?