| English hometask text |
| 1 | There are several reasons why electronic equipment breaks down: infant mortality among newly-built products, design errors, mechanical wear and corrosion. Televisions and other large electronic products may fail because of heat stress. Power supplies create heat which can damage electronic circuits. Electrical stress is another problem. Lightning can produce power surges and burn out equipment. Reversed polarity happens when people install batteries the wrong way. Physical stress is another cause of product failure. One example of physical stress is when drinks are spilled on equipment. |
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