Thursday, 26 June 2014 17:08
K3-06: TRANSFORMER - PRIMARY CURRENT VS LOAD
Additional Info
- ID Code: K3-06
- Purpose: Counterintuitive demonstration of how the primary current in a transformer increases when the secondary load increases.
- Description: A 15-watt light bulb in series with the 500-turn primary of a transformer is used as the "sensor" of primary current. Switching on a small bulb across the 46-turn secondary makes the primary sensor bulb glow more brightly. Before switching on the secondary bulb, ask your students what will happen to the bulb in the primary circuit. The picture at the right shows the secondary circuit switched on (switch at lower left) so the small secondary bulb is glowing and the primary bulb glowing more brightly. Ask your students what will happen to the primary sensor bulb when the secondary bulb is removed. After re-connecting, ask your students what will happen to the secondary bulb when the primary bulb is removed.
- Availability: Available
- References: REFERENCES: (PIRA 5K30.60)
Published in
K3 Transformers
Tagged under
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K3-01: INDUCTION IN A TRANSFORMER
Demonstrate that a change in the primary current induces a secondary voltage Read More
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K3-02: DEMOUNTABLE TRANSFORMER - SINGLE SPARKS
Demonstrate induction of large voltages by a large secondary-to-primary turn ratio Read More
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K3-03: DEMOUNTABLE TRANSFORMER - V VS N - PROJECTION METER
Demonstrate the effect of changing the number of turns in the secondary of a transformer Read More
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K3-04: DEMOUNTABLE TRANSFORMER - V VS N - OSCILLOSCOPE
Demonstrate the role of turns in the secondary of a transformer
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K3-05: DEMOUNTABLE TRANSFORMER - WELDER
Show that very large currents can be produced in the secondary of a step-down transformer Read More
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K3-06: TRANSFORMER - PRIMARY CURRENT VS LOAD
Counterintuitive demonstration of how the primary current in a transformer increases when the secondary load increases Read More
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