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I. Choose the letter of the correct answer 1. Electricity flows through a wire. We call this a current Current is measured in what units? a. Joules b. Amps c. Volts d. Watts 2. All lamps have some resistance. Putting a lamp with large resistance into a circuit will a. Make the voltage bigger b. Make the voltage smaller c. Make the current smaller d. Make the current bigger 3. You have identical lamps and cells. Which combination gives the brightest circuit? a. Two cells connected to one lamp b. Two cells connected to two lamps in a series c. Two lamps in parallel series connected to one cell d. One cell connected to one lamp 4. Two lamps are connected side by side so that the current is shared between them. We call this connected. a. In a series b. In a parallel c. In a circle d. In a loop 5. Lamps in your house are often connected in parallel. This is a good idea because a. They are cheaper c. You can switch them off separately b. They use less current d. The lights are dimmer
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