Oftmad
2011
H I G H E R S C H O O L C E R T I F I C AT E E X A M I N AT I O N
Physics
Total marks – 100 General Instructions • Reading time – 5 minutes • Working time – 3 hours • Write using black or blue pen Black pen is preferred • Draw diagrams using pencil • Board-approved calculators may be used • A data sheet, formulae sheets and Periodic Table are provided at the back of this paper • Write your Centre Number and Student Number at the top of pages 9, 13, 15, 19 and 21 Section I Pages 2–22
75 marks This section has two parts, Part A and Part B Part A – 20 marks • Attempt Questions 1–20 • Allow about 35 minutes for this part Part B – 55 marks • Attempt Questions 21–30 • Allow about 1 hour and 40 minutes for this part Section II Pages 23–30
25 marks • Attempt ONE question from Questions 31–35 • Allow about 45 minutes for this section
3430
Section I
75 marks Part A – 20 marks Attempt Questions 1–20 Allow about 35 minutes for this part Use the multiple-choice answer sheet for Questions 1–20.
1
What is the main cause of orbital decay of a satellite in low Earth orbit? (A) Tidal effects of the Moon (B) (C) The Sun’s gravitational field Friction between the atmosphere and the satellite
(D) The interaction of the solar wind with the satellite
2
A 60 kg object has a weight of 240 N on the surface of Planet X. What is the acceleration due to gravity on the surface of Planet X? (A) 0.25 m s–2 (B) (C) 4 m s–2 250 m s–2
(D) 14 400 m s–2
3
Metals have a crystal lattice structure. What part of the metal’s structure does the lattice represent? (A) The number of Cooper pairs (B) (C) The location of the metal ions The position of the free electrons
(D) The energy gap below the conduction band
4
Why are insulators poor conductors of electricity? (A) Insulators do not have a conduction band. (B) (C) The valence bands of insulators do not contain any electrons. Insulators have a large energy band gap and a full valence band.
H I G H E R S C H O O L C E R T I F I C AT E E X A M I N AT I O N
Physics
Total marks – 100 General Instructions • Reading time – 5 minutes • Working time – 3 hours • Write using black or blue pen Black pen is preferred • Draw diagrams using pencil • Board-approved calculators may be used • A data sheet, formulae sheets and Periodic Table are provided at the back of this paper • Write your Centre Number and Student Number at the top of pages 9, 13, 15, 19 and 21 Section I Pages 2–22
75 marks This section has two parts, Part A and Part B Part A – 20 marks • Attempt Questions 1–20 • Allow about 35 minutes for this part Part B – 55 marks • Attempt Questions 21–30 • Allow about 1 hour and 40 minutes for this part Section II Pages 23–30
25 marks • Attempt ONE question from Questions 31–35 • Allow about 45 minutes for this section
3430
Section I
75 marks Part A – 20 marks Attempt Questions 1–20 Allow about 35 minutes for this part Use the multiple-choice answer sheet for Questions 1–20.
1
What is the main cause of orbital decay of a satellite in low Earth orbit? (A) Tidal effects of the Moon (B) (C) The Sun’s gravitational field Friction between the atmosphere and the satellite
(D) The interaction of the solar wind with the satellite
2
A 60 kg object has a weight of 240 N on the surface of Planet X. What is the acceleration due to gravity on the surface of Planet X? (A) 0.25 m s–2 (B) (C) 4 m s–2 250 m s–2
(D) 14 400 m s–2
3
Metals have a crystal lattice structure. What part of the metal’s structure does the lattice represent? (A) The number of Cooper pairs (B) (C) The location of the metal ions The position of the free electrons
(D) The energy gap below the conduction band
4
Why are insulators poor conductors of electricity? (A) Insulators do not have a conduction band. (B) (C) The valence bands of insulators do not contain any electrons. Insulators have a large energy band gap and a full valence band.