Page 19 - The Basics IA by ETron Circuit Labs

mechanically connected in such a way that when current is increasing or decreasing through the coil, the paper cone moves, causing sound. To make sound, the coil requires a constant change in current. Therefore the Speaker only emits sound when you first touch the wire to the resistor, and when you disconnect the wire from the resistor.Procedure:Assemble the circuit and connect a 9-volt battery to the Battery Snap and tap the probe lead to the 10 ohm resistor. Note: Do not leave the wire touching the 10 ohm resistor, this will burn out the battery very quickly and may ruin the Speaker. Reverse the battery leads and do the procedure again. You will observe that the cone moves in the opposite direction.Observations:By doing this experiment, you have seen that the Speaker will produce a sound. When an audio signal is sent to a Speaker from an amplifier or radio, the Speaker produces the sound.Conclusion:You can conclude that the function of a Speaker is to convert electrical energy to sound.Check Your Work Here a b c d e 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 a b c d e f g h i j 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 f g h i j Here’s What You’ll Need...R1RESISTORhole 9ihole 22i10 Ohm ' (Brown, Black, Black, Gold) REDB1SPEAKERBLACKred = hole 25e black = hole 22iSPKR 1hole 25ahole 9fSCAN HERE TO SEE MORE ONLINE17LAB 9Visit us online at www.ETronCircuit.com for more exciting projectsLab Observations