Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 54

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Weekly Quiz Competition

Question 1
4 / -1

The characteristic X-ray radiation is emitted, when

A
The electrons are accelerated to a fixed energy

B
The source of electrons emits a monoenergetic beam

C
The bombarding electrons knock out electrons from the inner shell of the target atoms and one of the outer electrons falls into this vacancy

D
The valence electrons in the target atoms are removed as a result of the collision
Question 2
4 / -1

Molybdenum is used as a target element for production of X-ray because it is

A
A heavy element and can easily absorb high velocity electrons

B
A heavy element with a high melting point

C
An element having high termal conductivity

D
Heavy and can easily deflect electrons
Question 3
4 / -1

Mosley\'s law relates the frequencies of line x-rays with the following characteristics of the target element

A
Its density

B
Its atomic weight

C
Its atomic number

D
Interplaner spacing of the atomic planes

Solution
Question 4
4 / -1

According to Moseley\'s law of X-rays the frequency (v) of a particular characteristic X-ray and the atomic number (Z) of the element depend on each other as

A

B

C

D

Solution
Question 5
4 / -1

Electrons with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-rays is

A

B

C

D

Solution
Question 6
4 / -1

The shortest wavelength of X-rays emitted from an X-ray tube depends on the

A
Current in the tube

B
Voltage applied to the tube

C
Nature of gas in the tube

D
Atomic number of target material

Solution
Question 7
4 / -1

The wavelength of X-rays is of the order of

A
Centimetre

B
Micron (10^–6m)

C
Angstrom (10^–10m)

D
Metre

Solution
Question 8
4 / -1

If f₁, f₂ and f₃ are the frequencies of corresponding K_α, K_β and L_α X-rays of an element, then

A

B

C

D

Solution
Question 9
4 / -1

The longest wavelength that can be analysed by a sodium chloride crystal of spacing d= 2.82 Å in the second order is

A
2.82 Å

B
5.64 Å

C
8.46 Å

D
11.28 Å

Solution
Question 10
4 / -1

A direct X-ray photograph of the intestines is not generally taken by the radiologists because

A
Intestines would burst on exposure to X-rays

B
The X-rays would not pass through the intestines

C
The X-rays will pass through the intestines without causing a good shadow for any useful diagnosis

D
A very small exposure of X-rays causes cancer in the intestines