The following lists a number of corrections to the current published version.

**Table 2.1**:

Ferromagnetic | M is parallel to external H and B_{0} |

M is actually anti-parallel to the internal H, the “demagnetising field”.
**Figure 2.21**: The force at each end is T/l (torque divided by length). The equation stated in the caption is the total *twisting forces* on the object.

**Example 2.7**: The rotational force here is the sum of twisting forces on the ends of the object.

**Example 2.8**: Similarly 2057 N is the combined twisting forces.

**Chapter 2** **revision question 1**: Option A. 1.485 T

**Example 4.2**: *T m*^{-1} should read *T s*^{-1}.

**Equation 4.10**

**Equation 4.11a-c** L_{01}= 0.8* Rh*(1+0.36/t_{eff}) ;L12= 1.0* Rh*(1+0.36/t_{eff}); L_{2}=1.2* Rh*(1+0.36/t_{eff})

**Chapter 5**: *Steffan *should read *Stefan*.

**Chapter 7 p 164.** The inverse probability weight adjusted risk of hearing loss is 1.04.

**Table 8.2**: Concentration is in mmol ml_{-1}.

**Page 205** **Mythbuster**: *High* conductivity results in more RF heating.

**Page 210**: *dB/dt *should read *dB/dz*.

**Examples 9.1, 9.2, 9.6, 10.6, 11.15**: These calculations are for the net twisting forces on the object.

**Chapter 11 p265**: T/m not “T/s”.

**Equation 11.3**: similarly shows the sum of twisting forces.

**Equation A1.83:** This is the resistance per unit length: *R*_{m}/d.

**Equation A1.84**: Multiplying constant is 1/6.

**Answers to revision questions: Chapter 2 question 5**: the correct answer is C.

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