Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons
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Small voltages generated by a conductor with current in an external magnetic field.
The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point…
When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is
The magnetic flux through a wire loop in a magnetic field does not d
The unit of flux is _____ in cgs system.
The ability of a material to conduct magnetic flux through it.
Which of the following is a paramagnetic material?
A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
The temperature coefficient of resistance of conductors is
One of the common application of an air- cored choke.
A t/m is a unit of
Who discovered the most important electrical effects which is the magnetic effect?
All magnetic field originates from
The unit of electrical energy is
The magnetic field of a magnetized iron bar when strongly heated
An electron- volt (eV) is a unit of
The temperature coefficient of resistance of a conductor ______ with an increase in temperature.
A magnetizing force of 1000 AT/m will produce a flux density of __________ i
Temporary magnets are commonly employed in
Electrons at the outer shell are called
The force which set ups or tends to set up magnetic flux in a magnetic circuit
The reluctance of a magnetic circuit is not dependent on which of the following?
One coulomb of charge consists of ________ electrons.
Which of the following magnetic materials can be easily magnetized in both direction?
A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.
The tiniest element of matter
Defined as a closed path in which magnetic induction or flux flows
The direction of force o a current carrying conductor placed in a m found by
Who developed the electromagnetic theory of light in 1862?
Hysteresis refers to the ______ between flux density of the material and the magnetizing force applied.
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