Elenco Projects 306-511 - Manual (Page 58)

-57-
Project #493
OBJECTIVE: To make a simple voltage divider.
Set the meter (M2) to the LOW (or 10mA) scale. This circuit is a simple
voltage divider with parallel load resistors. The voltage across resistors
R3 & R4 is the same. The current through both paths are different, due
to the resistor values. Since resistor (R3) (5.1k
Ω ) is half the value of
resistor (R4) (10k Ω ), twice the current flows through R3.
The lights in a house are an example of this type of circuit. All are
connected to the same voltage, but the current is dependent on the
wattage of the bulb.
Fixed-Voltage Divider
Project #494
OBJECTIVE: To make a resistor checker.
Set the meter (M2) to the LOW (or 10mA) setting. Connect the jumper
wire to points A & B. Adjust the adjustable resistor (RV) so the meter
deflects to 10. The resistance between points A & B is zero. Remove
the jumper wire and put the 100
Ω resistor (R1) across points A & B. The
meter deflects to the 10, indicating a low resistance. Now replace
resistor (R1) with the other resistors. The meter will display different
readings for each resistor.
Resistor Measurement
To learn more about how circuits work, visit www.snapcircuits.net or page 62 to find out about our Student Guides.