The charge on a capacitor plate in a circuit, as a function of time, is shown in the figure
What is the value of current at $t = 4\,s$ ? ............... $\mu A$
JEE MAIN 2019, Easy
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$(A)$ directly proportional to the length of the potentiometer wire
$(B)$ directly proportional to the potential gradient of the wire
$(C)$ inversely proportional to the potential gradient of the wire
$(D)$ inversely proportional to the length of the potentiometer wire
Choose the correct option for the above statements: