Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 31:

• JAMB 1988

Which of the following symbolic representations is correct for an atom X with 22 electrons and 43 neutrons?

A. \(^{43}_{22}X\)
B. \(^{22}_{43}X\)
C. \(^{65}_{43}X\)
D. \(^{65}_{22}X\)

Question 32:

• JAMB 1989

Which of the following pairs is NOT part of the electromagnetic spectrum? i. Radio waves. ii. Beta rays. iii. Gamma rays. iv. Alpha rays

A. I and ii
B. Iii and iv
C. I and ii
D. Ii and iv

Question 33:

• JAMB 1989

When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the

A. Intensity of the radiation
B. Source of the radiation
C. Wavelength of the radiation
D. Detection device of the electron

Question 34:

• JAMB 1989

Which of the following is TRUE of the particles emitted in radioactive disintegration?

A. The alpha particle is the helium nucleus H
B. The alpha particle is lighter than the beta particle
C. The alpha particle is deflected more than the beta particle in a magnetic field
D. The beta particle is deflected more than the alpha particle in a magnetic field

Question 35:

• JAMB 1989

Eight alpha decays and six beta decays are necessary before an atom of 2 \(^{238}_{92}U\) achieves stability. The final product in the chain has an atomic number of

A. 70
B. 78
C. 82
D. 90