Jamb Physics 2023 Past Questions and Answers

Question 31:

• JAMB 2023

A metal sphere is placed on an insulating stand. A negatively charged rod is brought close to it. If the sphere is earthed and the rod is taken away, what will be the charge on the sphere?

A. The sphere will remain neutral.
B. The sphere will have a net negative charge.
C. The sphere will have a net positive charge.
D. The sphere will become polarized

Question 32:

• JAMB 2023

The property of wave shown in the diagram above is?


A. Diffraction
B. Refraction
C. Polarisation
D. Interference

Question 33:

• JAMB 2023

Which of the following statements regarding the application of electrical conduction via gases is/are correct?
Electrical conduction in gas is applied in:
(i) The identification of gases
(ii) Lighting/fluorescent tubes
(iii) Photocells
(iv) Cathode ray oscilloscope/T.V. tubes



A. (i), (iii) and (iv) only
B. (i), (ii) and (iv) only
C. (ii), (iii) and (iv) only
D. (i), (ii) and (iii) only

Question 34:

• JAMB 2023

Find the tension in the two cords shown in the figure above. Neglect the mass of the cords, and assume that the angle is 38° and the mass m is 220 kg



[Take g = 9.8 ms-2]

A. \(T_1\) = 2864 N, \(T_2\)= 3612 N
B. \(T_1\)= 3612 N, \(T_2\) = 2864 N
C. \(T_1\)= 3502 N, \(T_2\)= 2760 N
D. \(T_1\) = 2760 N, \(T_2\) = 3502 N

Question 35:

• JAMB 2023

A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.

[Take g = 10 ms-2]

A. 195
B. 271 m
C. 391 m
D. 136 m