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The momentum of an electron revolving in n^th orbit is given by (Symbols have their usual meanings)
Asked in JEE Main 25th July 1st Shift 2022 · Postulates, radius, speed and angular momentum
- (1) (nh)/(2π r)
- (2) (nh)/(2r)
- (3) (nh)/(2π)
- (4) (2π r)/(nh)
Answer: (1) (nh)/(2π r)
Step-by-step solution
Bohr: mvr=(nh)/(2π)
p=mv=(nh)/(2π r)
Why the other options are wrong
- (2) Drops the π from h/(2π).
- (3) Gives the angular momentum, not the linear momentum.
- (4) Inverts the expression.
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