Question

This Scottish Highland Cow tells you that a Henry over an Ohm makes a second. Is the statement true or false?

Answer 1

To see whether this is true, we first define the Henry.

The inductance of an electric circuit is one Henry when an electric current that changes at the rate of an Ampere per second results in an electromotive force of one volt across an inductor. Expressing this in dimensional form, we get

Here, is the inductance, whose SI unit is henry

Rearranging this, we get

Here, we can see that the quotient of inductance and resistance is time. In SI units, we can say that Henries over Ohms is seconds. The cow is correct.