In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be. Given 10

Question

In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be. Given 10 (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

V=|L (di/dt)| ⇒ L=(V/|(di)dt|)=(100/(0.25)0.025×10-3)=10mH

Q. In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be__________.
Given 10

$V = ∣ ∣ L \frac{d i}{d t} ∣ ∣$
$\Rightarrow L = \frac{V}{∣ \frac{d i}{d t} ∣} = \frac{100}{\frac{0.25}{0.025 \times 1 0 ^{- 3}}} = 10 m H$

Q. In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be__________. Given 10

V=∣∣​Ldtdi​∣∣​ ⇒L=∣dtdi​∣V​=0.025×10−30.25​100​=10mH

Q. In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A to 0 in a duration of 0.025 ms. The self-inductance of the choke (in mH) is estimated to be__________.
Given 10

$V = ∣ ∣ L \frac{d i}{d t} ∣ ∣$
$\Rightarrow L = \frac{V}{∣ \frac{d i}{d t} ∣} = \frac{100}{\frac{0.25}{0.025 \times 1 0 ^{- 3}}} = 10 m H$