KCET2021PhysicsAlternating Current
The current following through an inductance coil of self-inductance 6 mH at different time instants is as shown. The emf induced between t=20 ~s and t=40 ~s is nearly
Options
- A2 10⁻² ~V
- B3 10⁻² ~V
- C4 10⁻³ ~V
- D30 10⁻⁴ ~V
Correct answer
D. 30 10⁻⁴ ~V
Step-by-step solution
As we know, Induced emf, |e|=L d I d t Here, L=6 mH =6 10⁻³ H From the given graph, aligned |e| &=L (I₂-I₁ ) (t₂-t₁ ) &= L 20 = 6 10⁻³ 20 =3 10⁻⁴ ~V aligned