Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 161:

• JAMB 2018

Cathode rays are

A. High-energy electromagnetic waves
B. Protons
C. Neutrons
D. Streams of electrons

Question 162:

• JAMB 2018

What type of reaction is represented by the following scheme?
\(_{1} ^{2} X\) + \(_{1} ^{2} Y\) -----> \(_{2} ^{3} Z\) + \(_{1} ^{0} n\) + energy

A. Fusion reaction
B. Fission reaction
C. Chain reaction
D. Radioactive decay

Question 163:

• JAMB 2018

Which of the following statements are TRUE of isotopes?
I. Isotopes of an element have the same chemical properties because they have the same number of electrons
II. Isotopes of elements are normally separated using physical properties
III. Isotopes of an element have the same number of protons in their nuclei

A. I and II only
B. I and III only
C. II and III only
D. I, II and III

Question 164:

• JAMB 2018

One of the features of the fission process is that

A. It leads to chain reaction
B. Its products are not radioactive
C. Neutrons are not released
D. The of the masses of the reactants equals the sum of the masses of the products

Question 165:

• JAMB 2018

If the fraction of the atoms of a radioactive material left after 120years is \(\frac{1}{64}\), what is the half-life of the material? \(\frac{1}{64}\)

A. 20 years
B. 10 years
C. 2 years
D. 24 years