Question 496: AC fundamentals

Question

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is

Accepted Answer

Time constant of LR circuit is $$	au $$ = L/R.
$$ 	herefore $$ $$	au $$ = 40/8 = 5 sec.

Answer

5 seconds

Answer

1/5  seconds

Answer

40 seconds

Answer

20 seconds

AC fundamentals

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is

Choose the correct answer: