Conceptual Physics

Answers to selected problems

Chapter 23 Answers

C.1 2

C.3 (a) The combined field is zero

(b) To the right (c) The combined field is zero

C.5 Proton

Answers vary

0.1 Greatly increases

1.1 (a) 1.75eí3 N
(b) í2.89 N
(c) í184000 N
(d) 1.87eí12 N

1.3 1.36eí21 N

1.5 600 N

2.1 2.61 N/C

2.3 (a) 5.14e11 N/C

(b) Away from the proton

5.1 (a) Closer together
(b) The direction of the force is tangent to the field lines

6.1 (a) 2.59e11 N/C, to the right
(b) 1.12e11 N/C, to the left
(c) 9.55e10 N/C, to the right

6.3 16.2 C

7.1 18 lines going into í 3 q

7.3 (a) q 2
(b) q 1
q 3
(c) |q 2 | > |q 1 | > |q 3 |
(d) 3 times stronger

8.1 89.9 s

8.3 (a) í8.69eí17 N

(b) í9.54e13 m/s^2 (c) 1.00e6 m/s (d) 3.33eí 3

8.5 4.64e3 m/s

8.7 (a) 4.79e10 m/s^2

(b) 7.31eí7 s (c) 1.28eí2 m (d) 1.02eí18 J

12.1 9.76eí9 C·m

12.3 6.59 m