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  4. Chapter 19 Electric currents and moving charges in magnetic fields
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  6. Answers to Chapter 19 Problems

Answers to Chapter 19 Problems

 

19.1.1   0.3 mg 

19.2.1   1.08

19.2.2    (i)  3.57 × 10–4 N m–1    (ii)  2.06 Ã— 10–4 N m–1

19.3.1   (a)  \(  \omega q  \over 2  \pi a \)       (b)  \(  \omega a^2  \over 4 \)  

19.3.2

19.3.3   0.024 m N

19.5.1   (a)  1.02 × 10–16 N     (b) 1.06 × 10–19 N;      \( v_1v_2  \over c^2 \)  ~  10–3  ~  \( F_M \over F_E \) 

19.5.2   3.4 mm

19.5.3   1.1 × 1010 m;    1019 eV

19.5.4   3.3 ×  1011 m;      15 mm

19.6.1   (i)  4.38 × 105 m s–1     (ii)  0.183 m;      1.095 × 104 V m–1, in a direction perpendicular to B and v

19.6.2   5.6 × 105 A m–2

19.6.3   The uncharged particle travels in a straight line and the charged particle moves in a circle of radius 10.0 cm

19.6.4   (i) 1.0 × 10–4 T    (ii) 1.9 eV

19.6.5   140 MHz;    31 cm;   ~ 0.9%

19.6.6   one electron per atom 

19.6.7   (i)  3.85 × 10–4 m s–1&²Ô²ú²õ±è;&²Ô²ú²õ±è;   (ii)  3.08 × 10–4 V m-6     (iii)  7.7 × 10–6 V 

19.6.8   1.61 × 10–6 V

19.6.9   0.126 T

19.8.1   (a) 4.79 × 104 m s–1  (b) 6.56 × 10–6 s    (c) 3.06 × 10–19 Wb m–2   (d) 1.92 × 10–16 A m–2 perpendicular to the plane of the loop

19.8.2   (a) 4.5 × 10–25 A m2    (b) 0.09 A m2     (c) 1.1 × 10–12 A m2

19.9.1   (i) 2.3 × 103 A m–1    (ii)  2.9 mT    (iii)  9.5 × 10−4% 

19.9.2   (i) 320 A m–1   (ii) 0.2 T 

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