Tuesday, May 27

Today we corrected the Moving Charges Worksheet. I'm feeling so generous so here's the answers:

4) a) Fe and Fg
b) Positive charge
c) Fe = Fg
mg = Eq
q = mg/E = (3.2 x 10^-15)(9.8) / (19600)
= 1.6 x 10^-18 C

5) B = F/IL
= (0.40) / (20.0)(0.15)
= 0.13 T

6) B = F/IL
= (6.0 x 10^-5) / (1.5)(0.50)
= 8.0 x 10^-5 T

7) F = BIL
= (5.5 x 10^-5)(20.0)(10.0)
= 1.1 x 10^-2 N

8) B = F/qv
= (5.6 x 10^-13) / (1.6 x 10^-19)(2.1 x 10⁵)
= 16.7 T [left]

9) F = Bqv
= (1.2)(1.6 x 10^-19)(8.6 x 10⁴)
= 1.65 x 10^-14 N [right]

10) B = F/qv
= (4.0 x 10^-6) / (1.6 x 10^-19)(5.0 x 10⁵)
= 5.0 x 10⁷ T [into the page]

11) q = F/Bv
= (4.8 x 10^-14) / (5.0 x 10^-2)(2.0 x 10⁶)
= 4.8 x 10^-19 C

12)
a) F = Bqv
= (0.080)(1.6 x 10^-19)(4.0 x 10⁶)
= 5.12 x 10^-14 N

b) R = mv²/F
= (9.11 x 10^-31)(4.0 x 10⁶)² / (5.12 x 10^-14)
= 2.84 x 10^-4 m
13) v = BqR/m
= (5.0 x 10^-4)(1.6 x 10^-19)(0.50) / (9.11 x 10^-31)
= 4.4 x 10⁷ m/s


We also picked up a Review sheet and a worksheet named "The Path of a Charged Particle in a Magnetic Field." Test on Thursday !