Our copper wire coil opposes 25 ohm resistance
Durability at rho * length / section (resistivity)
A resistance resistor equivalent to the right should be used: 22 Ohm
I check whether the insertion of a complete magnetic short-circuit core at an incidence
Note that when closing R lu decreases to increase at opening! We'll see that !
2 parallel lamp circuits: top one lamp in series with the 24 ohm of the coil, bottom 22 ohm of the resistor in series with the second lamp identical
The core is well short-circuited, note the ignition speeds ...
In steady state, the lights are the same! But the transition of ignition ...
The top one, with coil will be delayed ...
When I send very short pulses the lamp of the top no longer has time to light up!
This delay is due to the time taken by the coil to create its magnetic field
As soon as it no longer undergoes variation, as its field corresponds to the intensity in the circuit, it behaves like a vulgar resistor of resistance 24 Ohm (its wire)
Set up, the voltages are identical
I replace with a switch, open the kernel and turn on ...
Without a core, the delay is no longer perceptible
On closure of the core, a short extinction of the bulb is observed in series!
To achieve to open the kernel subjected to electro-magnetization I cut
One finds the delay to the closing of the magnetic circuit also!