Question 190: Electromagnetic Induction

Question

A part of a complete circuit is shown in the figure. At some instant, the value of current I is 1A and
it is decreasing at a rate of 102 A s–1. The value of the potential difference VP
 – VQ
, (in volts) at
that instant, is _________.

Accepted Answer

V
P
+ L.$${{di} \over {dt}}$$ - 30 + 2i = V
Q
$$ \Rightarrow $$ V
P
+ 50 $$ 	imes $$ 10
-3
(-10
2
) - 30 + 2$$ 	imes $$1 = V
Q
$$ \Rightarrow $$ V
P
- V
Q
= 35 - 2 = 33

Electromagnetic Induction

A part of a complete circuit is shown in the figure. At some instant, the value of current I is 1A and it is decreasing at a rate of 102 A s–1. The value of the potential difference VP – VQ , (in volts) at that instant, is _________.

Choose the correct answer: