The students know that voltage is induced in a coil as long as
the magnetic field inside the coil varies. They are familiar with
electromagnets and, therefore, know that a coil with a current
flowing through it produces a magnetic field and they know the
factors responsible for the strength of the magnetic field.
This magnetic field takes time to form when the circuit is switched
on and takes time to fade away when the circuit is switched off.
This causes self-induced voltage to be formed each time.
In this experiment, the students should see that the self-induced
voltage formed when switching on the circuit counteracts the
increase in current.
What effect does a coil in a direct current circuit
have when the circuit is closed?
Investigate the effect of a coil installed in one of the
branches in a parallel circuit of two filament lamps.
| Materiallist (Excerpt) |
Product |
Amount |
|
Power supply 0...12 V DC/ 6 V, 12 V AC, 230 V
|
13505-93
|
1
|
|
U-core
|
07832-00
|
1
|
|
Coil, 400 turns
|
07829-01
|
1
|
|
Coil, 1600 turns
|
07830-01
|
1
|
|
On-off switch module, SB
|
05602-01
|
1
|
|
Socket module for incandescent lamp E10, SB
|
05604-00
|
2
|
|
Interrupted connector module, SB
|
05601-04
|
2
|
|
Yoke
|
07833-00
|
1
|
|
Resistor module 50 Ohm, SB
|
05612-50
|
1
|
|
Straight connector module, SB
|
05601-01
|
2
|
|
Angled connector module, SB
|
05601-02
|
4
|
|
T-shaped connector module, SB
|
05601-03
|
2
|
|
Filament lamps 4V/0.04A, E10, 10
|
06154-03
|
1
|
|
Tightening screw
|
07834-00
|
1
|
|
Connecting cord, 32 A, 500 mm, red
|
07361-01
|
1
|
|
Connecting cord, 32 A, 500 mm, blue
|
07361-04
|
1
|
|
Connecting cord, 32 A, 250 mm, red
|
07360-01
|
2
|
|
Connecting cord, 32 A, 250 mm, blue
|
07360-04
|
1
|
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