Physics 2012 Waec Past Questions and Answers

Question 1 :

• WAEC 2012

The derived unit of pressure can be expressed as

A. Kgms^-2
B. Kg m^-1s^-2
C. Kg m^-2s^-2
D. Kg m^-1s²

Question 2 :

• WAEC 2012

The derived unit of pressure can be expressed as

A. Kgms^-2
B. Kg m^-1s^-2
C. Kg m^-2s^-2
D. Kg m^-1s²

Question 3 :

• WAEC 2012

The diagram above illustrates trapped air in a syringe placed in water that is gradually heated. It is observed that the piston rises as the temperature of the water rises. Which of the following statements explains this observation?

A. Frequency of collision of trapped air molecules with walls of the syringe is more
B. Molecules of trapped air expands more
C. Speed of the trapped air molecules decreases
D. Number of molecules of trapped air increases

Question 4 :

• WAEC 2012

Which of the following devices is used to determine the relative density of an acid?

A. Manometer
B. Hydrometer
C. Hypsometer
D. Hygrometer

Question 5 :

• WAEC 2012

A block of wood of density 0.6 gcm\(^{-3}\), weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm\(^{-3}\). Calculate volume of the portion immersed (g = 10ms\(^{-2}\))

A. 510cm³
B. 340cm³
C. 254cm³
D. 170cm³