12. | Who developed Yahoo? | |||||||
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13. | Made from a variety of materials, such as carbon, which inhibits the flow of current…? | |||||||
Answer: Option C Explanation: So named because it resists (or inhibits) the flow of current. |
14. | The most common format for a home video recorder is VHS. VHS stands for…? | |||||||
Answer: Option A Explanation: JVC (Japan Victor Corporation) and Matsushita (Panasonic) developed the VHS format to compete with Sony which developed the Beta format as the first home video cassette recorder. VHS originally stood for Vertical Helical Scan, but now means Video Home System. |
15. | What does VVVF stand for? | |||||||
Answer: Option D Explanation: It is a method of controlling the speed of an AC induction motor, whereby speed, current and torque can all be accurately controlled. |