Science 7 · Unit 9: Electricity · Cambridge Lower Secondary Science Stage 7

9.5 Adding and removing components

15 questions · e.g. What does the ammeter read with two lamps?

Questions

1. Which component will increase the current when added correctly into a series circuit?
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2. An ammeter reads 0.6 A. Which component would reduce it to 0.3 A when added in series?
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3. Does adding another identical ammeter in series change the current?
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4. Marcus has a cell, a switch and two lamps in series. How could he increase the current?
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5. Besides adding a cell, how else could Marcus increase the current?
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6. Why does adding more cells to a series circuit increase the current?
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7. With one lamp, the ammeter reads 2 A. What will it read with two identical lamps in series?
- 1 A
- 2 A
- 0.5 A
- 4 A
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8. With one lamp, the ammeter reads 2 A. About what will it read with three identical lamps in series?
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9. Which statement is true about the current in any series circuit?
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10. You put the same components of a series circuit in a different order. What happens to the current?
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11. A series circuit has one cell and a lamp. You add a second identical cell. What happens to the current?
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12. Why do you need to be careful when adding more cells to a circuit?
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13. What happens to the current when you remove a cell and keep the other components the same?
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14. You add a second identical lamp to a series circuit with one lamp. How do the lamps shine?
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15. What happens to the current when you remove a lamp and keep the other components the same?
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