Related Questions
What is the correct answer?
4
An effect which is generally used in the gausameter to measure flux density.
What is the correct answer?
4
Hysteresis is a phenomenon of _________ in a magnetic circuit.
A. setting up constant flux
What is the correct answer?
4
Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
What is the correct answer?
4
Which of the following is a paramagnetic material?
What is the correct answer?
4
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely about its center under the influence of applied field and other magnets.
A. Ewing's theory of ferromagnetism
B. Oersted's ferromagnetism theory
C. Maxwell's magnetic theory
D. Ampere's circuital law
What is the correct answer?
4
Electric field intensity is a ________.
What is the correct answer?
4
The resistance of a material is ____________ its area of cross-section.
C. inversely proportional to
What is the correct answer?
4
Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
B. Hans Christian Oersted
What is the correct answer?
4
What is the diameter of an atom?
What is the correct answer?
4
A current if flowing east along a power line. If the earth's field is neglecteda the direction of the magnetic field below it is
What is the correct answer?
4
A magnetic field is
A. The current flow through space around a permanent magnet
B. The force set up when current flows through a conductor
C. The force that drives current through a resistor
D. The force between the plates of a charged capacitor
What is the correct answer?
4
The evaporation of electrons from a heated surface is called
What is the correct answer?
4
Used to maintain strength of magnetic field
What is the correct answer?
4
The dielectric constant of most materials lies between
What is the correct answer?
4
The current of electric circuit is analogous to which quantity of a m
What is the correct answer?
4
One coulomb of charge consists of ________ electrons.
What is the correct answer?
4
Which of the following materials has the least hysteresis loop area?
What is the correct answer?
4
Back emf refers to the
A. Current equal to the applied emf
C. Current opposing the applied emf
D. Voltage opposing the applied emf
What is the correct answer?
4
How much is the flux in Weber in the above problem?
What is the correct answer?
4
When the relative permeability of a material is slightly more than 1a it is called ______ material.
What is the correct answer?
4
A good conductor has how many valence electrons?
What is the correct answer?
4
If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then the end under observation is a south pole. This is known as
What is the correct answer?
4
What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred to another?
What is the correct answer?
4
The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
C. Either oppose or aid the change
D. Neither oppose nor aid the change
What is the correct answer?
4
The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?
What is the correct answer?
4
The phenomenon that when an electric current passes through an anisotropic crystala there is an absorption or liberation of heat due to the non-uniformity in current distribution.
What is the correct answer?
4
The magnetic field around the conductor is determined by the
C. Current divided by the resistance
D. Resistance divided by the current
What is the correct answer?
4
The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the platesa then electric field intensity will be
What is the correct answer?
4
A germanium atom has an atomic weight of72. How many neutrons are there?
What is the correct answer?
4
The temperature coefficient of resistance of a conductor ______ with an increase in temperature.