Jamb Physics 2020 Past Questions and Answers

Question 6:

• JAMB 2020

Which of the following statements about radioactivity is true?
(i) Alpha particle is positively charged
(ii) Beta particle is negatively charged
(iii) Gamma ray is neutral
(iv) Beta particle has the same mass as helium atom
(v) Gamma ray is charged.

A. I, ii, iii, iv only
B. I, ii, iii only
C. Iv and v only
D. I, ii and v only

Question 7:

• JAMB 2020

In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?

A. Temperature is a measure of the average kinetic energy of the molecules of a substance
B. Heat is a measure of the total kinetic energy of the molecules in a system
C. Different materials require different amounts of heat to cause a given change in temperature
D. All of the above

Question 8:

• JAMB 2020

The effect of closing the key K in the circuit shown in the figure above would be to?

A. Increase the current by 0.4A
B. Reduce the current by 0.4A
C. Increase the current by 0.6A
D. Reduce the current by 0.6A

Question 9:

• JAMB 2020

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

A. In a hospital to obtain photographs 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 work of art

Question 10:

• JAMB 2020

Natural radioactivity consists of emission?

A. \(\alpha\)-particles and \(\beta\)-rays
B. \(\alpha\)-particles and X-rays
C. \(\gamma\)-ray and X-rays
D. \(\alpha\)-particles and \(\beta\)-rays and \(\gamma\)-rays