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KCET2026PhysicsCurrent Electricity

Current flowing through a wire decreases linearly from 10 A to zero in 4 s as shown in the graph. Find the total charge flowing through the wire in the given time interval.

Options

  1. A40 C
  2. B20 C
  3. C10 C
  4. D80 C

Correct answer

B. 20 C

Step-by-step solution

The total charge flowing through the wire is given by the area under the current-time ( I-t ) graph. From the given graph, the area is a triangle with base t = 4 s and height I = 10 A . Q = Area of triangle = 1 2 base height Q = 1 2 4 10 = 20 C Therefore, the total charge flowing through the wire is 20 C . Answer: 20 C

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