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The unit of magnetic flux is.....
MMF stands for
magnetic most force
Magneto motive force
Mechanical motive force
None of the above
The opposition to the flow of flux is called as.....
Magnetisation curve is plotted between...........
In magnetic circuits, H stands for......
Magnetic flux density
Magnetic field strength
8.An insulator is a material that _______.
produces heat and light.
does not easily allow the flow of electricity
connects batteries to wires in a circuit
Material that allows electric current or heat to flow through easily.
The space around a magnet where magnetism acts is known as the _______________.
field of gravity
Lenz's law states that the induced voltage across an inductor ____.
Always opposes the current through the inductor
Always opposes any change in current
Changes polarity as current changes direction
Always opposes the applied votage
The production of a voltage across an inductor as a result of its own expanding or contracting magnetic field is called ____.
Faraday's second law
Reciprocal of reluctance is
Ohm’s law for magnetic circuits is _________
What device uses an electromagnet?
speakers in headphones
a light bulb
a phone charger
The two opposites ends on a magnet are known as _______________.
In order to induce a voltage across a coil ____.
The coil must be in motion
Current must be increasing
There must be relative motion between the coil and the magnetic field
The coil must be cut by at least 10^8 lines of force per second