Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 78

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Weekly Quiz Competition

Question 1
1 / -0

Debrogile wavelength of uncharged particles depends on

A
mass of particle

B
kinetic energy of particle

C
nature of particle

D
All above

Solution
Question 2
1 / -0

In which of the following transition will the wavelength be minimum?

A
n=2 to n= 1

B
n= 3 to n=2

C
n= 4 to n=3

D
n=5 to n=4

Solution
Question 3
1 / -0

The wavelength $$\lambda _e$$ , of an electron and $$\lambda _p$$ of a photon of same energy $$E$$ are related by

A
$$\lambda _ { p } \propto \lambda _ { e }$$

B
$$\lambda _ { p } \propto \sqrt { \lambda _ { e } }$$

C
$$\lambda _ { p } \propto \frac { 1 } { \sqrt { \lambda _ { e } } }$$

D
$$\lambda _ { p } \propto \lambda _ { e } ^ { 2 }$$

Solution
Question 4
1 / -0

The De-Broglie wavelength associated with electrons revoling round the nucleus is a hydrogen atom in ground state, will be-

A
$$0.3\ \mathring {A}$$

B
$$3.3\ \mathring {A}$$

C
$$6.62\ \mathring {A}$$

D
$$10\ \mathring {A}$$

Solution
Question 5
1 / -0

The velocity of particle A is 0.1 $$ma^{-1}$$ and that of particle B is 0.05 $$ma^{-1}$$. If the mass of particle B is five times that of particle A, then the ratio of de Broglie wavelengths associated with the particles A and B is

A
2 : 5

B
3 : 4

C
6 : 4

D
4 : 3

E
5 : 2

Solution
Question 6
1 / -0

Calculate the wavelength (in nanometer) associated with a proton moving at $$1.0\times 10^3ms^{-1}$$ (Mass of proton $$= 1.67\times 10^{-27}$$ kg and $$h=6.63\times 10^{-34}$$ Js):-

A
2.5 nm

B
14.0 nm

C
0.032 nm

D
0.40 nm

Solution
Question 7
1 / -0

A near ultraviolet light photon of 300 nm is absorbed by a gas and then reemitted as two photons. One photon is red with wavelength of 760 nm760 nm. What would be the wave number of the second photon?

A
$$2.02\times10^{-3} m^{-1}$$

B
$$0.502\times10^{-3} m^{-1}$$

C
$$6\times10^{-3} m^{-1}$$

D
$$0.125\times10^{-1} m^{-1}$$
Question 8
1 / -0

Calculate the wavelength of electron moving with a velocity of $$2.05 \times {10^7}m/\sec $$

A
$$3.552 \times {10^{ - 11}}m$$

B
$$2.132 \times {10^{ - 11}}m$$

C
$$4.123 \times {10^{ - 11}}m$$

D
$$5.134 \times {10^{ - 11}}m$$

Solution
Question 9
1 / -0

If in hydrogen $$e^{-}$$ jumps from third lymen line to the first , the obtained wavelength is :

A
$$\frac { 16 } { 3 R }$$

B
$$\frac { 1 } { 4 R }$$

C
$$\frac { 3 } { 4 R }$$

D
$$\frac { 15 } { 4 R }$$
Question 10
1 / -0

$$ {\lambda }_{ e } $$, $$ { \lambda }_{ p} $$ and $$ { \lambda }_{a } $$ are the de broglie wavelengths of electrons , proton and $$ \alpha $$ particles. If all are accelerated by same potential , then.

A
$$ { \lambda }_{ e }<{ \lambda }_{ p } <{ \lambda }_{ a } $$

B
$$ { \lambda }_{ e }<{ \lambda }_{ p } >{ \lambda }_{ a } $$

C
$$ { \lambda }_{ e }>{ \lambda }_{ p } <{ \lambda }_{ a } $$

D
$$ { \lambda }_{ e }>{ \lambda }_{ p } >{ \lambda }_{ a } $$

Solution