Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 93

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Weekly Quiz Competition

Question 1
4 / -1

Solid targets of different elements are bombarded by highly energetic electron beams. The frequency (f) of the characteristic X-rays emitted from different targetsvaries with atomic number Z as

A

B

C

D

Solution
Question 2
4 / -1

X-rays of λ =1 Å have frequency

A
3 × 10⁸ Hz

B
3 × 10¹⁸ Hz

C
3 × 10¹⁰ Hz

D
3 × 10¹⁵ Hz

Solution
Question 3
4 / -1

Mosley measured the frequency (f) of the characteristic X-rays from many metals of different atomic number (Z) and represented his results by a relation known as Mosley\'s law. This law is (a, b are constants)

A
f = a(Z –b)²

B
Z = a (f – b)²

C
f ²= a (Z –b)

D
f = a (Z – b)^1/2

Solution
Question 4
4 / -1

Penetrating power of X-rays depends on

A
Current flowing in the filament

B
Applied potential difference

C
Nature of the target

D
All of the above
Question 5
4 / -1

The energy of a photon of characteristic X-rays from a Coolidge tube comes from

A
The kinetic energy of the striking electron

B
The kinetic energy of the free electrons of the target

C
The kinetic energy of the ions of the target

D
An electronic transition of the target atom
Question 6
4 / -1

In vacuum an electron of energy 10 keV hits tungsten target, then emitted radiation will be

A
Cathode rays

B
X-rays

C
Infrared rays

D
Visible spectrum
Question 7
4 / -1

X-rays are produced in laboratory by

A
Radiation

B
Decomposition of the atom

C
Bombardment of high energy electron on heavy metal

D
None of the above
Question 8
4 / -1

Bragg\'s equation will have no solution if

A
λ > 2d

B
λ < 2d

C
λ < d

D
λ = d

Solution
Question 9
4 / -1

For harder X-rays

A
The wavelength is higher

B
The intensity is higher

C
The frequency is higher

D
The photon energy is lower
Question 10
4 / -1

When cathode rays strike a metal target of high melting point with very high velocity, then

A
X-rays are produced

B
Alpha-rays are produced

C
UV waves are produced

D
Ultrasonic waves are produced