A. Data Table l: RL Circuits Experimental Inductance (L) Inductance Sigral Inter

Question

A. Data Table l: RL Circuits Experimental Inductance (L) Inductance Sigral Interface [L Total Inductance (L tot) Max. Voltage (Vmax) Min. Voltage (Vmin) Half Max Voltage ime at half-max Volt Value Theoretical Value 0.0082 HInductance (L) 0.0082 H 0.02200 H Inductance sigral interface 0.02200 H Lsig) Total Inductance (Ltotal) Resistor (R1) 0.0302H 0.0302 H 5.645 V 100 (ohmns) 0.332 V Resistance of inductor (RL) 5 (ohmns) 2.65 V Resistance of Signal Interface (Rsig 6 (ohmns) Total resistance (R total ohmn5 1.885 X 10 2.72X10A(-4)s -4) s 16.9 ms 0.2 X10A-3) T 2.88 X10A(-4)s percentage Difference, theoretical to experimental value of t0/2) 6.1%

Explanation / Answer

when we close the switch,

the bulb burns brightly and then gets dimmer. When you open the switch, the bulb burns very brightly and then quickly goes out.

The reason for this strange behavior is the inductor.

When current first starts flowing in the coil, the coil wants to build up a magnetic field.

While the field is building, the coil inhibits the flow of current. Once the field is built, current can flow normally through the wire.

When the switch gets opened, the magnetic field around the coil keeps current flowing in the coil until the field collapses.

This current keeps the bulb lit for a period of time even though the switch is open. In other words, an inductor can store energy in its magnetic field, and an inductor tends to resist any change in the amount of current flowing through it.

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