An electron has a mass of 9.1×10−31kg. It revolves round the nucleus in a circular orbit of radius 0.529×10-10metre at a speed of 2.2×106m/s. The magnitude of its linear momentum in this motion is
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a
1.1×10-34kg-m/s
b
2.0×10-24kg-m/s
c
4.0×10-24kg-m/s
d
4.0×10-31kg-m/s
answer is B.
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Detailed Solution
Linear momentum = =mv=9.1×10-31×2.2×106=2.0×10-24kg-m/s
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An electron has a mass of 9.1×10−31kg. It revolves round the nucleus in a circular orbit of radius 0.529×10-10metre at a speed of 2.2×106m/s. The magnitude of its linear momentum in this motion is