Current Order

Project Number: 48

Description: Build the circuit; it has the parts arranged in a loop. Place the wind fan on the motor (M4). Set the meter (M6) to the 50mA setting. Set the slide switch (S5) to position B. Place the solar cell (B7) in bright sunlight or near an incandescent lamp. If the light is bright enough, the meter will show a current, the LEDs (D1 & D5) will light, and the fan will spin. You may need to give the fan a push to get it started. If the meter shows zero, you can use the 0.5mA setting. Part B: Rearrange the parts around the loop into the order shown, or any similar order you like. Keep the "+" side of the parts in the same direction as you move the parts around the loop, and keep the light on the solar cell, the same as before. The LED brightness, fan speed, and the current shown on the meter should be the same no matter how you order the parts.

Snappy: This circuit has the battery (B4) and solar cell producing voltage to push electric current through the LEDs and the motor. The current is flowing counter-clockwise around the loop, and is the same through all parts. If you rearrange the parts in the loop, without changing their "+" orientation to the flow of the current, then you have exactly the same circuit.