Cu loss

Eddy current loss 

Hysteresis loss

All of these 

Ph = hysteresis loss,

Bm =maximum flux density

K_h = hysteresis co-efficient

K = Steinmetz co-efficient

Maximum value of flux density 

Thickness and volume of material 

frequency magnetic flux revercel 

All of these

$2\sqrt{2} \mathrm{\pi } \mathrm{f} \mathrm{x} \mathrm{l} {\mathrm{B}}_{\mathrm{m}}$

$\frac{2 \rho l}{b dx}$

$\frac{\sqrt{2} \mathrm{\pi } \mathrm{f} {\mathrm{B}}_{\mathrm{m}} \mathrm{x} \mathrm{b} \mathrm{dx}}{\rho }$

$\frac{{\mathrm{\pi }}^2 {\mathrm{f}}^2 {{\mathrm{B}}_{\mathrm{m}}}^2 \mathrm{b} \mathrm{l} {\mathrm{t}}^3}{6 \rho }$

$2\sqrt{2} \mathrm{\pi } \mathrm{f} \mathrm{x} \mathrm{l} {\mathrm{B}}_{\mathrm{m}}$

$\frac{2 \rho l}{b dx}$

$\frac{\sqrt{2} \mathrm{\pi } \mathrm{f} {\mathrm{B}}_{\mathrm{m}} \mathrm{x} \mathrm{b} \mathrm{dx}}{\rho }$

$\frac{{\mathrm{\pi }}^2 {\mathrm{f}}^2 {{\mathrm{B}}_{\mathrm{m}}}^2 \mathrm{b} \mathrm{l} {\mathrm{t}}^3}{6 \rho }$

$2\sqrt{2} \mathrm{\pi } \mathrm{f} \mathrm{x} \mathrm{l} {\mathrm{B}}_{\mathrm{m}}$

$\frac{2 \rho l}{b dx}$

$\frac{\sqrt{2} \mathrm{\pi } \mathrm{f} {\mathrm{B}}_{\mathrm{m}} \mathrm{x} \mathrm{b} \mathrm{dx}}{\rho }$

$\frac{{\mathrm{\pi }}^2 {\mathrm{f}}^2 {{\mathrm{B}}_{\mathrm{m}}}^2 \mathrm{b} \mathrm{l} {\mathrm{t}}^3}{6 \rho }$

$2\sqrt{2} \mathrm{\pi } \mathrm{f} \mathrm{x} \mathrm{l} {\mathrm{B}}_{\mathrm{m}}$

$\frac{2 \rho l}{b dx}$

$\frac{\sqrt{2} \mathrm{\pi } \mathrm{f} {\mathrm{B}}_{\mathrm{m}} \mathrm{x} \mathrm{b} \mathrm{dx}}{\rho }$

$\frac{{\mathrm{\pi }}^2 {\mathrm{f}}^2 {{\mathrm{B}}_{\mathrm{m}}}^2 \mathrm{b} \mathrm{l} {\mathrm{t}}^3}{6 \rho }$

MMF require for the iron part

MMF require for the Air gap

MMF require for the iron part + MMF require for the Air gap

MMF require for the iron part - MMF require for the Air gap

total length of an iron core 

length of frame 

length of airgap

all of these 

The average value of flux density must be taken into account to calculate the MMF required for the airgap.

The reluctance of the airgap with slotted armature will be more as compared to the smooth armature (core) machine.

The airgap reluctance for a machine having ventilation ducts will be more than a machine having no ventilation ducts.

All of these