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

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 (A) 20 seconds (B) 5 seconds (C) 1/5 seconds (D) 40 seconds

Tardigrade Admin · Accepted Answer

Time constant is L / R Given, L=40 H R =8 Ω ∴ T =40 / 8=5 sec

Q. 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

20 seconds

5 seconds

1/5 seconds

40 seconds

Time constant is $L / R$
Given, $L = 40 H & R = 8 Ω$
$∴ T = 40/8 = 5 sec$

Q. 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