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Published byMarylou Hodges Modified over 2 years ago

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**Series and parallel 5 Look carefully at this circuit:**

7Jc Series and parallel 5 Look carefully at this circuit: a) Which switches have to be closed for bulb A to come on? b) Which bulbs will come on if you press switches 1 and 3?

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7Jc Series and parallel 6 Mrs Jones has some Christmas tree lights, and one bulb is broken. They will not come on until she has replaced the bulb. a) Are the lights connected in a series or parallel? b) Explain your answer. 7 Only one of Mr Patel’s headlights is working on his car. Are the lights in series or parallel? Explain your answer.

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7Jc Series and parallel 8 A cell connected to two bulbs in a series circuit will last longer than if it is connected to the same two bulbs in a parallel circuit. Explain why this happens.

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**Series and parallel 5 Look carefully at this circuit:**

7Jc Series and parallel 5 Look carefully at this circuit: a) Which switches have to be closed for bulb A to come on? 1 only b) Which bulbs will come on if you press switches 1 and 3? A and B

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7Jc Series and parallel 6 Mrs Jones has some Christmas tree lights, and one bulb is broken. They will not come on until she has replaced the bulb. a) Are the lights connected in a series or parallel? b) Explain your answer. Series; because when one was broken none of them would work.

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7Jc Series and parallel 7 Only one of Mr Patel’s headlights is working on his car. Are the lights in series or parallel? Explain your answer. Parallel; if they were in series neither would work if one was broken.

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7Jc Series and parallel 8 A cell connected to two bulbs in a series circuit will last longer than if it is connected to the same two bulbs in a parallel circuit. Explain why this happens. Because current is lower and so does not get used up so quickly.

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Warm-up: A light bulb with 100 ohms of resistance is connected to a 9 volt battery. How much current is running through the light bulb? Warm-up: A light.

Warm-up: A light bulb with 100 ohms of resistance is connected to a 9 volt battery. How much current is running through the light bulb? Warm-up: A light.

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