Jamb Physics 2019 Past Questions and Answers

Question 46:

• JAMB 2019

When water is boiling, it

A. Gets hotter
B. Increase is mass
C. Decreases in mass
D. Changes to steam

Question 47:

• JAMB 2019

A mixture of blue and red pigment when illuminated by white light will appear

A. Green
B. Orange
C. Purple
D. Magenta

Question 48:

• JAMB 2019

A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)

A. 0.795m
B. 0.625m
C. 0.335m
D. 0.125m

Question 49:

• JAMB 2019

A man on a bench will exert the greatest pressure on the bench when he

A. Lies flat on his back
B. Lies flat on his belly
C. Stands on both feet
D. Stands on the toes of one foot

Question 50:

• JAMB 2019

Gases conduct electricity under

A. High pressure & high voltage
B. Low pressure & low voltage
C. Normal pressure & low voltage
D. Low pressure & high voltage