Waec Physics Past Questions For Year 1993

Question 11

A particle starts from rest and moves with a constant acceleration of 0.5 ms^-2? Calculate the time taken by the particle to cover a distance of 25m.

waec 1993

• A. 25s
• B. 7.1s
• C. 10.0s
• D. 50.0s
• E. 100.0s.

Question 12

Longitudinal waves cannot be

waec 1993

• A. diffracted
• B. retracted
• C. polarized
• D. reflected
• E. superposed

Question 13

Which of the following are correct of plane- polarized light? I. Plane polarization of light is the formation of hydrogen bubbles on the particles of light. II. Plane polarization of light is the splitting of light into its spectral components III. Plane-polarized light vibrates in one plane only. IV. Polarization is characteristic of transverse waves.

waec 1993

• A. I and II only
• B. I and IV only
• C. II and III only
• D. III and IV only
• E. I and III only

Question 14

A gas has a volume of 546 cm³ at O^oC. What is the volume of the gas at- 100^oC if its pressure remains constant?

waec 1993

• A. 346cm³
• B. 446cm³
• C. 546cm³
• D. 646cm³
• E. 746 cm³.

Question 15

A solid metal cube of side 10 cm is heated from

10^oC to 60^oC. lf the linear expansivity of the metal is 1.2 x 10⁵K^-1, calculate the increase in its volume.

waec 1993

• A. 0.6cm³
• B. 1.2 cm³
• C. 1.8 cm³
• D. 3.6 cm³
• E. 6.0cm³.