Ohm's law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.

A conducting device obeys Ohm's law when the resistance of a device is independent of magnitude and polarity of applied potential difference.

A conducting material obeys Ohm's law when the resistance of material is independent of the magnitude and direction of applied electric field.

All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong.

Its speed

Its momentum

Its kinetic energy

Its potential energy

depends on its initial velocity

is independent of its initial velocity

increases linearly with time

depends on its initial displacement

The disc

The sphere

Both have the same moment of inertia

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