Physics 2018 Waec Past Questions and Answers

Question 26 :

• WAEC 2018

When two flat plate conductors are arranged in such a way that they possess equal and opposite charges seperated by a dielectric, they form a/an

A. Electroscope
B. Electrophorus
C. Capacitor
D. Cell

Question 27 :

• WAEC 2018

Which electrical device is illustrated above?

A. A.c. generator
B. A.c. motor
C. D.c. generator
D. D.c. motor

Question 28 :

• WAEC 2018

A simple barometer is constructed using a liquid \(Q_{1}\) of density 16.2\(g/cm^{3}\). Calculate the least lenth of the tube to be used to measure pressure of 1.5atm. [Density of mercury = 13.6\(g/cm^{3}\), 1atm = 76.0 cm of Mercury]

A. 1358mm
B. 957mm
C. 760mm
D. 638mm

Question 29 :

• WAEC 2018

A bar AB is balanced horizontally on two knife edges as illustrated as in the diagram above. Determine the weight of the bar.

A. 10.0N
B. 20.0N
C. 40.0N
D. 50.0N

Question 30 :

• WAEC 2018

A bar AB is balanced horizontally on two knife edges as illustrated as in the diagram above. Determine the weight of the bar.

A. 10.0N
B. 20.0N
C. 40.0N
D. 50.0N