Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 70

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Weekly Quiz Competition

Question 1
1 / -0

A proton moves on a circular path of radius $$6.6\times 10^{-3}m$$ in a perpendicular magnetic field of $$0.625\ tesla$$. The De broglie wavelength associated with the proton will be

A
$$1\overset {\circ}{A}$$

B
$$0.1\overset {\circ}{A}$$

C
$$0.01\overset {\circ}{A}$$

D
$$0.001\overset {\circ}{A}$$

Solution
Question 2
1 / -0

$$\sqrt{V}$$ on two particles $$A$$ and $$B$$ are plotted against de-Broglie wavelength. Where $$V$$ is the potential on the particle. Which

A
$$M_A=m_B$$

B
$$M_A > m_B$$

C
$$M_A < m_B$$

D
$$M_A \leq m_B$$
Question 3
1 / -0

A particle is moving with 3 times faster than speed of $$e^{-}$$. Ratio of wavelength of particle & electron is $$1.8\times10^{4}$$ then particle is :

A
Neutron

B
a-particle

C
Deutron

D
Tritium

Solution
Question 4
1 / -0

An electron moving with velocity $$6.62 \times {10^3}$$. The De-Broglie wavelength associated with electron is (mass of electron$$ = 9 \times {10^{ - 31}}Kg$$
Plank's constant $$ = 6.62 \times {10^{ - 34}}J - S$$

A
$$1 \times {10^{ - 29}}m$$

B
$$1 \times {10^{ - 5}}m$$

C
$$1 \times {10^{ -7}}m$$

D
$$1 \times {10^{ 10}}m$$

Solution
Question 5
1 / -0

Which of the following transition has minimum wavelength in Hydrogen atom?

A
$${ N }_{ 4 }$$ $$\rightarrow $$ $${ N }_{ 1 }$$

B
$${ N }_{ 2 }$$ $$\rightarrow $$ $${ N }_{ 1 }$$

C
$${ N }_{ 4 }$$ $$\rightarrow $$ $${ N }_{ 2 }$$

D
$${ N }_{ 3 }$$ $$\rightarrow $$$${ N }_{ 1 }$$

Solution
Question 6
1 / -0

The wavelengyh of a cricket ball weighing 100 g and travelling with a velocity of 50 m/s is

A
$$1.3\times 10^{-28}m$$

B
$$1.3\times 10^{-37}m$$

C
$$1.3\times 10^{-34}m$$

D
$$1.3\times 10^{-30}m$$

Solution
Question 7
1 / -0

An electron in a hydrogen atom in the ground state absorbs energy equal to 1.5 times the minimum energy required to remove the electron from the hydrogen atom. The wavelength of the electron emitted will be

A
$$4.70\quad \overset { 0 }{ A } $$

B
$$5.70\quad \overset { 0 }{ A } $$

C
$$6.70\quad \overset { 0 }{ A } $$

D
$$9.40\quad \overset { 0 }{ A } $$
Question 8
1 / -0

What should be the De-Broglie wavelength of confined particle in the box ?

A
L/2n

B
2L/n

C
L/n

D
nL

Solution
Question 9
1 / -0

How fast is an electron moving if it has a wavelength equal to distance travelled in one second?

A
$$ \sqrt { \frac { m } { h } } $$

B
$$ \sqrt { \frac { h } { m } } $$

C
$$ \sqrt { \frac { h } { p } } $$

D
$$ \sqrt { \frac { h } { 2 \times K E } } $$

Solution
Question 10
1 / -0

An alpha particle moving with an initial velocity $$(uj)$$enters a region of uniform magnetic field $$B = Bk$$. the de-Broglie wavelength of the alpha particle.

A
Increases to a higher constant value

B
Decreases to a lower constant value

C
Increases and decreases periodically

D
Remains constant

Solution

de-Broglie wave length remains constant.
$$\therefore $$ Option $$D$$ is correct.