metallic resistor

carbon resistor

wire wound resistor

variable resistor

8 Ohm

0.125 Ohm

24 Ohm

12.5 Ohm

d=D-(0.97/N)

d=D-P

d=D-(0.97+N)

d=P-D

52 mm

104 mm

200 mm

140 mm

the space that is emptied below the level of mercury column in the tube

the space that is emptied above the level of mercury column in the tube

the space that is full above the level of mercury column in the tube

the space that is full below the level of mercury column in the tube