Measuring Magnetization by Induction Method:

(i) Changing Magnetic flux:

Figure 29.01 shows typical arrangement of changing magnetic flux in the circuit. By taking Δ(BA)/Δt as 4 Tm²/s; the increase in the number of turns helps to increase the magnetic field strength. With increasing the N from 2 to 4, the e.m.f. induced in the circuit (ξ) increases from 8 volts to 16 volts.

Figure 29.01: Schematic of changing the magnetic flux.

(ii) Moving a magnet towards/away from coil:

Figure 29.02 displays the typical arrangement of a magnet moving towards or away from the coil. Let us assume that ΔB/Δt as 0.4 T/s, A as 0.002 m² and N as 5 turns in the coil, then the voltage induced in the circuit is determined to be:

Figure 29.02: Schematic of moving a magnet towards/away from the coil.