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The magnetic core has low reluctance. Low reluctance means that it is a very attractive path for magnetic fields to flow through compared to air hence, most of the circulating flux in the toroid will …

Magnetic field strength (H with units of ampere (turns) per metre) is the intensity of a magnetic field just as electric field strength (E in volts per metre) is an intensity of an electric field. Bot …

The H-field is: - $$\dfrac{MMF}{\ell_e}$$ Where MMF (magneto motive force) is amps x turns = 2.5 x 500 = 1250 At Where \$\ell_e\$ (effective mean length of core) The top and bottom mean length is t …

Why there is no internal surface? Well of course there is so, the explanation in your 2nd paragraph is either wrong, misleading or, you have misinterpreted it. Basically there can be no self-enclosi …

If the magnets are just spinning and not physically moving closer or farther from the sensor then how is the sesnor getting different values for magnetic flux density? Of course they are movi …

For dc electromagnets, more turns does mean more magnetic field. With ac induction coils, if you double the number of turns, inductance generally quadruples and, for a given ac voltage and frequency a …

Think about two very closely positioned loops of wire. If you apply an ac voltage to one loop, the induced voltage on the other loop would be the same. If a load on the second loop took current, the v …

If both windings have the same number of turns and are driven with the same voltage then both will contribute equal amounts of flux to the core i.e. they will each produce a flux that is half the flux …

With two identical windings both driven in phase, the winding with the highest supply voltage will produce the magnetization current for the core. In addition to that magnetization current, it will al …

A cross sectional coil area of 10 square cm is 0.001 square metres. A flux reversal from +0.4 T to -0.4 T is a change of 0.8 T This means that \$\frac{d\Phi}{dT}\$ = 0.001 x 0.8/0.02 = 0.04 webers pe …

The magnetic flux in a regular transformer is used only to induce a voltage across the secondary terminals. So, if you have a fairly ideal 1:1 transformer (for example) and you apply 100 volts 50 Hz t …

So the peak current used to find \$B\$ is \$I=I_{RMS}\cdot \sqrt2\$. No, that is not the case. The load current passing into the transformer primary and exiting on the secondary has nothing to do wi …

How can I explain why the flux in the core stays the same even after turning on SW2? SW1 turns on and current through P1 ramps up at say "X" amps per microsecond Some time later SW2 turns on and th …

In the example, the core permeability is assumed infinite (it says it in two places). With infinite permeability comes infinite inductance and therefore any reasonable AC excitation (frequency greater …

Imagine that when winding your ten secondaries you took the approach of twisting ten lots of insulated wire and creating a single secondary where the ten wires were soldered up at the ends. That is eq …