Figure 3 shows, for specific values of A (cross-sectional area of the solenoid) and N, how L varies with solenoid length at 25°C.
Figure 3
- For the conditions specified in Figure 2 and I = 0.75 Amps, the solenoid will attract iron metal particles most strongly when the number
of coils is closest to which of the following?
A. 0 coils
B. 40 coils
C. 120 coils
D. 200 coils
- According to Figure 2, does magnetic field strength vary with current?
F. Yes; as magnetic field strength increases, the current decreases.
G. Yes; as magnetic field strength increases, the current increases.
H. No; as magnetic field strength increases, the current decreases.
J. Yes; as magnetic field strength increases, the current remains the same.
