Which of these items is not needed to make a working circuit?
A. Connecting wire
B. A switch
C. A component such as a bulb
D. A cell
Answer (3)
The answer is (D) a cell
Hope this helps!
Without a cell to supply energy, or a component such as a bulb to dissipate it, and some connecting wire, you couldn't make a circuit.
But you could make one without a switch.
(The only problem then would be that you could not turn off the bulb, and you couldn't get any sleep until the cell runs down. :-) )
A working circuit requires connecting wire, a cell for power, and a load like a bulb. A switch is not essential for a basic circuit to function. Therefore, the answer is B. A switch.
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