Page 248 - Physics_Form_2

Physics for Secondary Schools

Revision Exercise 2 Chapter Four
1.
a b c d Exercise 4.2
(iv) (iii) (iii) (iv) 3. 0.25 m/s, 0.5 m/s

4. 70 140
,
FOR ONLINE READING ONLY
3. 6 10  7 Ωm 5. 120 cm
6. 7
4. 15
Exercise 4.3
5. 1.44 10  18 J 2. v = 15 cm, h = 3 cm
i
3. f = 30 cm
6. (a) 1.6 A (b) 46.08 kJ 4. f = 6 cm, v = –15, h = –6 cm
i
7. (b) (i) 4 V (ii) 8 V (c) 2 A 5. v = 30 cm, m = –1,

8. (a) (i) 12 V (ii) 12 V Revision Exercise 4

(b) (i) 6 A (ii) 3 A (c) 9 A 3. (a) concave mirror
(b) 100 cm (c) 25 cm

10. (a) 8.87 10  3  4. (a) concave mirror
(b) 4 (c) 60 cm
11. (a) 32 (b) 4.5 W 8. (a) 36 cm (b) 3 cm
(c) 1.41 W (d) 0.28 W

13. (a) 10 (b) 2.4 A Chapter Five
(c) 1.2 A (d) 1.2 A
(e) 12 V Exercise 5.1

1. 47.8 cm
14. (a) 4.62 (b) 3.25 A 28.9
(c) 1.5 A, 1.0 A, 0.75 A 2. 2.3 m
3.
(d) 49 W 4. (a) 1.1 (b) 27.8

(e) 22.5 W, 15 W, 11.25 W 5. 1.95 m
6. (a) 1.24 10 m/s 8 (b) 24.4

Chapter Three Exercise 5.2
2. 1.20

Revision Exercise 3 3. 45
4. 1.5
14. (a) No
5. 1.5
(b) Yes, 0.75 m from P 6. (a) 14.17 cm, 62.7


242
Student’s Book Form Two

Physics Form 2 Final.indd 242 25/10/2025 10:29