Answer:
171 ft
Explanation:
The distance to be calculated is AB
AB = AC + BC
AC; Cos 60 = AC ÷ 135
AC = 135 cos 60 = 67.5 ft
BC; Cos 40 = BC ÷ 135
BC = 135 cos 40 = 103.416 ft
AB = 67.5 + 103.416 = 170.9159998210 ft
Distance between starting point to end point = 171 ft
Answer:
Explanation:
magnetic filed, B = 0.65 T
initial diameter, d = 17.5 cm
final diameter, d' = 6.6 cm
time, t = 0.48 s
(a) According to Lenz's law, the direction of induced current is clockwise.
(b) Let e is the induced emf.
initial area, A = π r² = 3.14 x 0.0875 x 0.0875 = 0.024 m²
final area, A' = π r'² = 3.14 x 0.033 x 0.033 = 0.00342 m²
change in area, ΔA = A - A' = 0.024 - 0.00342 = 0.02058 m²
The magnitude of induced emf is given by
e = 0.65 x 0.02058 / 0.48
e = 0.028 V
(c) R = 2.5 ohm
i = e / R
i = 0.028 / 2.5
i = 0.011 A