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K2-12. Self-Induction - Demountable Transformer
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HomeK. Electromagnetic PrinciplesK2. Electromagnetic InductionK2-12. Self-Induction - Demountable Transformer
K2-12. Self-Induction - Demountable Transformer
Purpose
To demonstrate back-EMF in an inductor.
Equipment
1000-turn iron-core transformer, neon bulb, 7.5 volt battery, and key switch.
Setup Time
5 minutes.
Images
Description
A 1000-turn transformer coil and a neon bulb connected in parallel are connected in series with a 7.5 volt battery and a key switch, as shown in the circuit below. When the switch is closed current flows in the inductor. When the key is released the field of the inductor collapses, inducing an EMF sufficient to light the neon bulb.
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See pagesk1. forces on moving charges
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See pagesk2. electromagnetic induction
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See pagesk3. transformers
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See pagesk4. motors & generators
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See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
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See pagesk7. rlc circuits
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See pagesk8. electromagnetic waves
-
See pagesk1. forces on moving charges
-
See pagesk2. electromagnetic induction
-
See pagesk3. transformers
-
See pagesk4. motors & generators
-
See pagesk5. electrical properties of matter
-
See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves
Physics Lab Demos