Question

The amount of charge Q passed in time t through a crosssection
of a wire is Q = 5 t² + 3 t + 1.
The value of current at time t = 5 s is
(a) 9 A (b) 49 A
(c) 53 A (d) None of these

Answer 1

Answer:

don't know this answer

Answer 2

Answer:

The answer is (c) 53 A

Explanation:

Given

Q = 5 t² + 3 t + 1

dQ/dt = 10t + 3

At t= 5

dQ/dt = 10×5 + 3 = 53