In a coil, the current changes from to in 0.2 s and induces an emf 0.1 V. The self-inductance of the coil is:

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
In a coil, the current changes from $- 2 A$ to $+ 2 A$ in 0.2 s and induces an emf 0.1 V. The self-inductance of the coil is: [2024]

1 4 mH

2 5 mH

3 2.5 mH

4 1 MH

Ans.
(2)

${(Emf)}_{induced} = - L \frac{d i}{d t}$

In magnitude form,

$| {Emf}_{ind} | = | (-) L \frac{d i}{d t} |$

$\Rightarrow 0.1 = \frac{(L) [+ 2 - (- 2)]}{0.2} \Rightarrow L = \frac{0.1 \times 0.2}{4} = 5 mH$

Want Us to Email you About Special Offers & Updates?