Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 90

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Weekly Quiz Competition

Question 1
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 2
4 / -1

A beam of 35.0 keV electrons strikes a molybdenum target, generating the X-rays. What is the cut-off wavelength?

A
35.5 pm

B
40.0 pm

C
15.95 pm

D
18.2 pm

Solution
Question 3
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 4
4 / -1

The wavelength of X-rays is of the order of

A
Centimetre

B
Micron (10^–6m)

C
Angstron (10^–10m)

D
Metre

Solution
Question 5
4 / -1

X-rays and y-rays of the same energies may be distinguished by

A
Their velocity

B
Their ionizing power

C
Their intensity

D
Method of production
Question 6
4 / -1

When a beam of accelerated electrons hits a target, a continuous X-ray spectrum is emitted from the target. Which of the following wavelength is absent in the X-ray spectrum, if the X-ray tube is operating at 40,000 volts?

A
0.25 Å

B
0.5 Å

C
1.5 Å

D
1.0 Å

Solution
Question 7
4 / -1

An X-ray has a wavelength of 0.010 Å. Its momentum is

A
2.126 × 10^–23 kg-m/s

B
6.626 × 10^–22 kg-m/s

C
3.456 × 10^–25 kg-m/s

D
3.313 × 10^–22 kg-m/s

Solution
Question 8
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
Question 9
4 / -1

The wavelength of K_α line in copper is 1.54 Å. The ionization energy of K electron in copper in Joule is

A
11.2 × 10^–27

B
12.9 × 10^–16

C
1.7 × 10^–18

D
10 × 10^–16

Solution
Question 10
4 / -1

Absorption of X-ray is maximum in which of the following different sheets?

A
Copper

B
Gold

C
Beryllium

D
Lead