Electrostatics 5 Question 10
11. The charge on a capacitor plate in a circuit as a function of time is shown in the figure.
(Main 2019, 12 Jan II)
What is the value of current at $t=4 \mathrm{~s}$ ?
(a) $2 \mu \mathrm{A}$
(b) $1.5 \mu \mathrm{A}$
(c) Zero
(d) $3 \mu \mathrm{A}$
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Answer:
Correct Answer: 11. (c)
Solution:
- As we know, Current,
$ I=\frac{d q}{d t} $
$=$ Slope of $q$ versus $t$ graph
$=$ Zero at $t=4 \mathrm{~s}$; (as graph is a line parallel to time axis at $t=4 \mathrm{~s})$
