Alternating Current - Result Question 3
3. The current $(I)$ in the inductance is varying with time according to the plot shown in figure. [2012]
Which one of the following is the correct variation of voltage with time in the coil? (a)
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 3. (d)
Solution:
- (d) $V=-L \frac{d i}{d t}$
Here $\frac{d i}{d t}$ is + ve for $\frac{T}{2}$ time and
$\frac{d i}{d t}$ is - ve for next $\frac{T}{2}$ time so
