Waec Physics 2004 Past Questions and Answers

Question 56:

• WAEC 2004

A parallel beam of unpolarised light is incident on a plane glass surface at an angle of 58\(^{o}\) to the normal. If the reflected beam is completely polarised, calculate the refractive index of the glass.

Question 57:

• WAEC 2004

State three methods of polarising an unpolarised light

Question 58:

• WAEC 2004

(a) Define diffusion
(b) State Graham's law of diffusion

Question 59:

• WAEC 2004

A Spiral spring of natural length 20.00cm has a scale hanging freely in its lower end. When an object ass 40 g is placed in the pan. its length becomes cm. When the object is replaced with another of 60g, the length becomes 22.05cm. Calculate the mass scale pan. [g = 10 ms\(^{-2}\)]

Question 60:

• WAEC 2004

(a) Define Young's modulus
(b) When a force of 50 N is applied to the free end of an elastic cord, an extension of 4 cm is produced in the cord. Calculate the work done on the cord.