Jamb Physics 2023 Past Questions and Answers

Question 26:

• JAMB 2023

In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be

A. South and north
B. North and south
C. North and north
D. South and south

Question 27:

• JAMB 2023

Which of the following types of electromagnetic waves is used in night vision goggles?

A. Microwaves
B. Ultraviolet waves
C. Infrared waves
D. Radio waves

Question 28:

• JAMB 2023

Which of the following is a type of wave that is both mechanical and longitudinal?

A. Water waves
B. Seismic waves
C. Sound waves
D. Light waves

Question 29:

• JAMB 2023

In an AC circuit, resonance occurs when the impedance of the circuit is:

A. Zero
B. Maximum
C. Equal to the capacitive reactance of the circuit
D. Minimum

Question 30:

• JAMB 2023

The pitch of a musical note is determined by the frequency of the sound wave that it produces. If two instruments have the same frequency, which of the following factors will most affect the difference in their pitches?

A. The shape of the instrument
B. The tension of the string
C. The size of the instrument
D. The material of the instrument