Phet electricity & magnetism lr lab

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AP-C

Electricity & MagnetismInduction
LR Lab

Name ____________________
Teacher __________________
Period  _____

Purpose

Materials  computer and internet

Background  Tipler Chapter 30-8

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/induct.html#c1

Directions

Construct the circuit shown to the right.

What is the unit of the quotient of inductance and resistance?  Show your work below.

The quotient of L and R is called the time constant.  Adjust the time constant of the circuit to one second.  Record the value of inductor and bulb’s resistance.

An inductor will be fully charged/discharged in a time of 4 to 5 L/R.  How long will it take your LR combination to fully charge or discharge?

Add the necessary meters and sketch the graphs of i vs t, and VResistor vs t, on the graphs below when the inductor is charging and discharging.

Inductor is Charging

Inductor is Discharging

Current vs. Time

Current vs. Time

VResistor vs. Time

VResistor vs. Time

Add the necessary meters and sketch the graphs of i vs t, and VInductor vs t, on the graphs below when the inductor is charging and discharging.

Inductor is Charging

Inductor is Discharging

Current vs. Time

Current vs. Time

VInductor vs. Time

VInductor vs. Time

When is the brightness of the bulb increasing?

When is the brightness of the bulb decreasing?

When does the battery supply the potential to light the bulb?

When does the inductor supply the potential to light the bulb?

Does the direction of charge flow change through the inductor?  If yes, explain when.

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