Experiment to Demonstrate the Effect of Inductors on a.c. & d.c.

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10 Terms

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Draw a diagram of this experiment (DCPS)

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Draw a diagram of this experiment (ACPS)

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Method

Set up apparatus as shown in both diagrams

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Results (DCPS)

Bulb lights

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Results (ACPS)

Bulb doesn't light

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Conclusion

Inductors block a.c. but pass d.c.

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What is self-induction?

A changing magnetic field in a coil induces an emf in the coil itself e.g. inductor

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How does Lenz's law affect self-induction?

Induced current will always be in the opposite direction to the applied current

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Explain what happens in the d.c. circuit

Electromagnetic self-induction takes place for a short period of time only delaying the lightening of the bulb briefly

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Explain what happens in the a.c. circuit

Electromagnetic self-induction takes place continuously because the current is constantly changing. This drastically reduces the total current flowing through the circuit