De Broglie wavelength of the electron in a Bohr orbit

1. A.
   will become zero
2. B.
   will remain same
3. C.
   will decrease
4. D.
   will increase

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1. A.
   $n\pi r$
2. B.
   $\frac{\pi r}{n}$
3. C.
   $\frac{nr}{2\pi}$
4. D.
   $\frac{2\pi r}{n}$

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1. A.
   $4\pi r$
2. B.
   $6\pi r$
3. C.
   $8\pi r$
4. D.
   $\dfrac{\pi r}{4}$

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1. A.
   $\ \lambda \propto \frac{1}{n^{2}}$
2. B.
   $\ \lambda \propto n^{2}$
3. C.
   $\ \lambda \propto \frac{1}{n}$
4. D.
   $\lambda \propto n$

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1. A.
   $\dfrac{\lambda_1}{3}$
2. B.
   $\dfrac{\lambda_1}{2}$
3. C.
   $2\lambda_1$
4. D.
   $3\lambda_1$

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1. A.
   $n\pi r$
2. B.
   $\dfrac{nr}{\pi}$
3. C.
   $\dfrac{2\pi r}{n}$
4. D.
   $\dfrac{nr}{2\pi}$

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1. A.
   $n\pi r$
2. B.
   $\dfrac{nr}{\pi}$
3. C.
   $\dfrac{2\pi r}{n}$
4. D.
   $\dfrac{nr}{2\pi}$

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