The current flowing through wire depends on time as, I = 3r + 2 t + 5. The charge flowing through the cross-section of wire in time t = 0 to t = 2 second is
To find the charge, integrate the given current function with respect to time from t = 0 to t = 2. The integral of current over time gives total charge. After solving, the charge is found to be 22 C, so the correct answer is (a) 22 C.
Class 12th Science Physics NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.
Share
To find the charge
Q, integrate current I = 3t² + 2t + 5 over t = 0 to t =2:
Q = ∫02(3t² +2t + 5)dt
Solving,
Q = t + t² + 5t 02
= (8+4+10) − (0) = 22C
Answer: (a) 22 C.
For more visit here:
https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/