NEET2026Physics-Alternating Current
NEET 2026 Physics Peak Value Calculation MCQ Question
Type: MCQ-numerical-Medium-Class 12
The peak value of an alternating current is 5 Å and frequency is 60 Hz. How long will the current, starting from zero, take to reach the peak value?
A
1/120 s
B
1/60 s
C
1/30 s
D
1/240 s
Correct Answer
Option D
Detailed Explanation
Alternating current, i = iₚₑₐₖ sin(ωt) where ω = 2πf = 2π × 60 = 120π rad/s. At peak value, sin(120πt) = 1, which gives 120πt = π/2. Solving for t gives t = 1/240 s.
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