ElectroMagnetic InductionHard
Question
A coil of inductance 8.4 mH and resistance 6Ω is connected to 12 V battery. The current in the coil is 1 A at approximately the time
Options
A.500 s
B.20 s
C.35 ms
D.1 ms
Solution
The current-time (i-t) equation in L-R circuit is given by
[Growth of current in L-R circuit]
i = i0(1-e-t/tL) ........(i)
where
and
and
and i = 1A
t = ?
Substituting these values in Eq. (i), we get
t = 0.97 × 10-3s
or t = 0.97 ms
t
1 ms
[Growth of current in L-R circuit]
i = i0(1-e-t/tL) ........(i)
where
and
and
and i = 1A
t = ?
Substituting these values in Eq. (i), we get
t = 0.97 × 10-3s
or t = 0.97 ms
t
1 msCreate a free account to view solution
View Solution FreeMore ElectroMagnetic Induction Questions
200Ω resistance and 1 H inductance are connected in series with an A.C. circuit. The frequency of the source is Hz....A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as $B = 0.4sin(300t)$ Tesla. The no...If a bar magnet is dropped vertically into a, long copper tube then its final acceleration will be:-...An e.m.f. of 15 volt is applied in a circuit containing 5 henry inductance and 10 ohm resistance. The ratio of the curre...A conducting loop of finite resistance lies on the $x - y$ plane. There is a constant magnetic field in the $z$ directio...