HANDWRITTEN ANSWERS ONLY (NOTEXT)

HANDWRITTEN ANSWERS ONLY (NOTEXT)

HANDWRITTEN ANSWERS ONLY (NOTEXT)

F r _ i ; . E Open with Google Docs v In a normal domestic electrical system, all electrical appliances [including the lights} are connected in parallel, rather than in series. Identify two signicant advantages of connecting them in this fashion. Question 2 (3 marks) The diagram below shows an electric eld between two oppositely charged parallel plates. Three identical positive charges are placed at points L, M and N. Which charge experiences the largest force? Justify your answer. Make sure to include relevant formula in your answer. m. 9.. Question 3 (3 marks) A ray of light is incident on an air/glass interface at an angle of 30 to the normal. Calculate the angle of refraction of the ray in the slab. Question 4 (3 marks) Calculate the critical angle at which a ray of light must hit a glass/air interface to be totally internally reflected.Question 5 (4 marks) Calculate the reading on the ammeter for the circuit shown below. 180 10 V 5 Open with Google Docs v Explain why a mechanical wave needs a medium to transfer energy. Question 7 (2 marks) In the two circuits below, each of the resistors has the same value, R; (D C2) Which circuit has the iarger equivalent resistance? Justify your answer including relevant formulas. Page7r13 6.1 +