Alternating current is converted into direct current by a 1). transformer 2). dynamo 3). oscillator 4). rectifier
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1. Which among the following is false about displacement?
2. In MRI machine which one Of the following is used?
3. A photo-electric cell converts
4. Where does hydroelectric energy come from?
5. Name the process of production of energy in the Sun
6. A white and smooth surface is
7. Question 5.2:Answer the following questions:(a) The earth’s magnetic field varies from point to point in space.Does it also change with time? If so, on what time scale does it change appreciably?(b) The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the...
8. A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls
9. Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
10. ?What is the primary source of food for?marine life?
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