 |
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| . 1 pt(s). |
Susan compared the current that flowed in different wires. She set up the circuits shown below. Susan wanted to find out if more current flowed in copper wire or nichrome wire. Which two circuits should she choose for a fair test? | |
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A. | the effect of the material the wire is made from on the size of the current flow |
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B. | the effect of the thickness of the wire on the size of the current flow |
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C. | the effect of the length of the wire on the size of the current flow |
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D. | the effect of the battery on the size of the current flow |
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| . 1 pt(s). |
The pie charts show the main use of energy in the UK in 2000. What was the largest use of energy in 2000?
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A. | transport | |
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B. | domestic | |
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C. | services | |
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D. | industry | |
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| . 1 pt(s). |
The pie charts show the main use of energy in the UK in 1960 and 2000. Which energy use decreased from 1960 to 2000?
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A. | transport | |
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B. | domestic | |
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C. | services | |
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D. | industry | |
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| . 1 pt(s). |
A circuit is set up as shown below.
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A. | A | |
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B. | B | |
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C. | C | |
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D. | D | |
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E. | E | |
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| . 1 pt(s). |
Objects with like charges repel and unlike charges attract. The girl’s hair and the comb have —
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A. | unlike charges | |
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B. | like charges | |
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C. | neutral charges | |
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D. | no charges | |
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| . 1 pt(s). |
Laundry in a clothes dryer often becomes charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity? | |
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A. | Short circuits in the dryer charge the laundry. |
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B. | Clothes with metal pieces conduct electricity in the dryer |
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C. | Electrons are transferred as clothes rub against each other in the dryer |
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D. | Heat from the dryer charges the air and produces lightning |
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| . 1 pt(s). |
Bits of paper are attracted to the surface of this balloon. What attracts the paper pieces to the balloon?
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A. | Friction | |
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B. | Magnetism | |
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C. | Potential energy | |
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D. | Static electricity | |
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| . 1 pt(s). |
A solar cell produces electricity when light shines upon it. A pupil measured the voltage produced by a solar cell at different light intensities. The results are shown in the graph below. what voltage is produced by a light intensity of 80 units?
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A. | 28mV | |
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B. | 23mV | |
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C. | 80mV | |
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D. | 30mV | |
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| . 1 pt(s). |
A solar cell produces electricity when light shines upon it. A pupil measured the voltage produced by a solar cell at different light intensities. The results are shown in the graph below. What light intensity produces a voltage of 14mV?
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A. | 5 units | |
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B. | 14 unuts | |
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C. | 40 units | |
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D. | 46 units | |
