Post Utme Physics Past Questions and Answers

Question 771:

Which of the following statements about the characteristics of sound waves is correct?

A. Loudness decreases with increase in intensity
B. The pitch of a note is determined by its amplitude
C. The intensity of sound wave is proportional to its amplitude
D. The quality of a note depends on its overtones.

Question 772:

Which of the following instruments gives a pure note when sounded ____________

A. Timing drum
B. Tuning fork
C. Siren
D. Guitar

Question 773:

A pre-junction diode is used as an ____________

A. Rectifier in a DO circuit
B. An amplifier in an AC circuit
C. A rectifier in an AC circuit
D. An amplifier in a DC circuit

Question 774:

The process through which free electrons leave the surface of hot metals is known as ____________

A. Thermion ion emission
B. Photo emission
C. Photon emission
D. Electron emission

Question 775:

The electrolyte in the nickel –iron (Nife) accumulator is ____________

A. Ammonium chloride solution
B. Dilute tetraoxosulphate (vi) acid
C. Copper tetraoxosulphate (vi) solution
D. Potassium hydroxide solution