الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Appendices
APPENDIX (B)
Answer of Some Selected Problems
Chapter 2
2.1) 1.610 -9 N repelling each other
2.4) 1.210 -5 C and 3.810 -5 C
2.5) q=1/2Q
2.6) 8.510 -2 N in the positive x-axis
2.8) 0.873N at 330 o
2.11) (0,0.853m)
2.13) (b) 2.410 -8 C
Chapter 3
3.2) (a) (-5.5810 -11 N/C)j,
(b) (1.0210 -7 N/C)j
3.3) (a) (-5.2010 3 N/C)j, (b)
(2.9310 3 N/C)j and (c) 5.8510 3 N/C at
225 o .
3.4) 5.610 -11 C
3.7) 110 3 N/C in the direction of the
beam
3.8) (a) 1.510 3 N/C, (b) 2.410 -16 N up,
(c) 1.610 -26 N and (d) 1.510 10 .
3.15)
E
q
a
along the bisector,
away from the triangle
3.17) (a) 2.710 6 m/s, (b) 110 3 N/C
2
Chapter 4
4.2) 5.5610 5 N.m 2 /C
4.7) (a) zero, (b) 5.410 3 N/C and (c)
540N/C both radially outward
4.9) (a) zero, (b) 12510 4 N/C radially
outward, (c) 639N/C radially outward and
(d) no charge
4.10) (a) zero, (b) 810 7 N/C radially
outward (c) zero and (d) 7.3510 6 N/C
radially outward
4.11) (i) Q r
E ,
3
4 a
(ii)
Q
E ,
2
4
r
(iii) zero (iv) zero and (v) inner Q; outer
zero.
4.12) (a) zero, (b) 3.6610 5 N/C, (c)
1.4610 6 N/C and (d) 6.510 5 N/C radially
outward
4.13) (a) 0.713C, (b) 5.7C
4.14) (i) q
E radially outward,
2
l r
(ii)-q on both inner and outer surfaces,
q
(iii) E radially outward
2
l r
4.15) (a) zero, (b) 7.210 6 N/C away from
the center
4.16) 5.0810 5 N/C up
4.17) (i) zero, (ii) E
, and (iii) zero
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