Elementary Modern Physics - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1980

Which of the following statements on the use of X-rays is incorrect? X-rays are used

A. In hospitals to obtain photogaphs of tissues and bones in the body
B. For the treatment of malignant growths like cancer cells
C. In detecting fingerprints
D. To reveal hidden flaws in metal castings and welded joints
E. To detect alternations which have been made to works of art

Question 7:

• JAMB 1980

Which of the following elements is the best absorber of X-rays?

A. Hydrogen
B. Oxygen
C. Calcium
D. Copper
E. Lead

Question 8:

• JAMB 1980

The activity of a radioactive substance depends on

A. Temperature and purity
B. Temperature and age
C. Purity and age
D. Age, purity and temperature
E. None of the above

Question 9:

• JAMB 1980

Natural radioactivity consists of the emission of

A. \( \alpha \) -particle and \( \beta \) rays
B. \( \alpha \) -particle and X-rays
C. \( \gamma \)-rays and X-rays
D. \( \alpha \)-particle, \( \beta \) rays and \( \gamma \)-rays
E. \( \alpha \) -particle, \( \beta \) rays, \( \gamma \)-rays and X-rays

Question 10:

• JAMB 1980

What is the acceleration of a particle whose motion is graphically displayed in the diagram above

A. 0.67ms^-2
B. 0.83^-2
C. 0.87^-2
D. 92^-2
E. 2.0^-2