demo09 - Demonstrations for Class 9 - Inductance You know...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Demonstrations for Class 9 --- Inductance You know that one coil can induce an Emf in a neighboring coil. It also happens that one coil can induce an Emf in itself, called "self-inductance". These single coils or "inductors" are commonly used in circuit applications. Like resistors and capacitors, inductors for circuit use come in many shapes and sizes. Typically, all they are is a coil of wire wound into a solenoid or a toroid. What inductors do is slow down voltage changes in a circuit—they act as the electrical analog to "inertia". Just like a heavy mass resists motion, an inductor resists voltage change. If an applied voltage goes from zero to a maximum instantaneously, the inductor will ensure that the circuit voltage rises slowly to the maximum voltage. A very common application of inductors and how one coil can induce an Emf in a neighboring coil is the transformer. Transformers are everywhere, for instance in the power supply for your Laptop. By inductance, transformers can take a high voltage and "step it down" to a low voltage, or take a low voltage and "step it up" to a high voltage. This is all done by varying the number of turns in each of the two coils and, therefore, the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/17/2008 for the course PHYS 1200 taught by Professor Stoler during the Spring '06 term at Rensselaer Polytechnic Institute.

Page1 / 2

demo09 - Demonstrations for Class 9 - Inductance You know...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online