Here are the solutions for the three circuits shown in your worksheet.
1. Circuit A
Circuit Diagram:
To draw this, start with a battery symbol (two parallel lines, one long and one short). Follow the wire to a switch symbol (a line with a gap that can close). Then connect it to a light bulb symbol (a circle with an X inside). Finally, connect the wire back to the other side of the battery. All parts are in a single loop (series).
Questions:
(a) Is this circuit open or closed?
Closed. The switch is pushed down, connecting the wires so electricity can flow through the whole loop.
(b) If this is a closed circuit, what is the load?
The load is the
light bulb. (The load is the part that uses the electricity to do work, like making light).
***
2. Circuit B
Circuit Diagram:
Start with the battery. The wire splits into two separate paths (parallel branches).
*
Path 1: Goes through a light bulb and then a switch.
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Path 2: Goes through a second light bulb and then a second switch.
Both paths reconnect and go back to the battery.
Questions:
(a) Is this circuit open or closed?
Open. Even though there are switches, looking closely at the illustration, the switches are drawn in the "up" position (disconnected). This breaks the path, so electricity cannot flow.
(b) If this is a closed circuit, what is the load?
*(Note: Since the circuit is currently open, technically there is no current flowing. However, if you were to close the switches, the loads would be the components using power).*
The loads are the
two light bulbs.
***
3. Circuit C
Circuit Diagram:
Start with the battery. Connect a wire to a switch. After the switch, the wire splits into two paths (parallel). Each path has a light bulb on it. The two paths join back together and return to the battery.
Questions:
(a) Is this circuit open or closed?
Closed. The switch is drawn in the "down" position, completing the connection from the battery to the rest of the circuit.
(b) If this is a closed circuit, what is the load?
The loads are the
two light bulbs.
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Final Answer:
1. Circuit A
*
(a) Closed
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(b) The light bulb
2. Circuit B
*
(a) Open
*
(b) The two light bulbs
3. Circuit C
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(a) Closed
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(b) The two light bulbs
Parent Tip: Review the logic above to help your child master the concept of drawing circuits worksheet.
