Waec Physics 2006 Past Questions and Answers

Question 56:

• WAEC 2006

(a) Distinguish between the forces of adhesion and cohension
(b) Give one example each of the forces of adhesion and cohesion.

Question 57:

• WAEC 2006

Explain why water in a narrow glass tube has a concave meniscus while mecury in the same tube, has a convex meniscus

Question 58:

• WAEC 2006

(a) State two applications of electrolysis.
(b) Explain what is meant by the electrochemical equivalent of copper is 3.3 x 10\(^{-7}\) kgC\(^{-1}\)

Question 59:

• WAEC 2006

The uncertinty in determining the duration during which an electron remains in a particular energy level before returning to the ground state is 2.0 x 10\(^{-9}\)s. Calculate the uncertainty in determining its energy at that level [Take \(\frac{h}{2\pi} = h = 1.054 \times 10^{-34}\) Js]

Question 60:

• WAEC 2006

A paralIel beam of unpolarized light is incident on a plane glass of refractive index 1.60 at an angle to the normal. If the reflected beam is completely polarized, calculate the angle of incidence of the beam.