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Q. What is the effective resistance (in Ω) of two resistors 21 Ω and 28 Ω connected in parallel?
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Q. Which of these waves can be polarized ?
Q. Which one of the following mirrors is suitable to obtain real image of an object?
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Q. What is the normal temperature of human being on Kelvin scale?
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Q. Which one of the following is the unit of activity of a radioactive source?
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