Rock is generally an insulator. Note that the color of a rock is usually not a good indicator of is composition of properties.
Rubber is an insulator for normal voltages.
A capacitor is composed of two conductors separated by an insulator, which stores electric charge between the conductors.
Conductors
Insulator.
wool is a insulator
it's an insulator. conductors are things like metals or salts.
The metal is the conductors, the rubbery or plastic stuff is the insulator.
The metal is the conductors, the rubbery or plastic stuff is the insulator.
go with what your gut tells you...i would guess insulator
A capacitor
A capacitor
Metals, such as gold and silver, are conductors whereas wood and rubber are insulators.