Why is the minus sign omitted in the voltage across the inductor?

[ajith.mk91]

According to faraday's law the governing equation is emf=-d(flux)/dt.But we usually write the voltage across the inductor as v=d(flux)/dt.What happened to the minus sign?

 

[sophiecentaur]

If there's an inductor in series with a battery and you open the switch, the flux will be decreasing yet the voltage that appears across the inductor in a sense that will 'maintain' the current. I think that (Lenz's law) accounts for the choice of sign.

 

[technician]

It is used to indicate that the induced emf OPPOSES the change producing it.
If you only need to calculate the magnitude is is common to drop the - sign

 

[granpa]

Kirchhoff's law states the the sum of the voltage drops around the circuit must equal zero.