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Nature of Surfaces in Contact

Which of the ...

Question

Which of the following will produce the maximum friction?
(a) rubbing of sand paper on glazed paper
(b) rubbing of sand paper on glass table top
(c) rubbing of sand paper on aluminium frame
(d) rubbing of sand paper on sand paper

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Solution

(d) rubbing of sand paper on sand paper

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एक जैसी दो धात्विक पट्टिकाओं A तथा B को क्रमशः कागज तथा रेगमाल से रगड़ा जाता है। इनमें से कौनसी पट्टिका अधिक चमकेगी?

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Nature of Surfaces in Contact

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