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NEET2026PhysicsAlternating CurrentActual

The peak value of an alternating current is 5 A and frequency is 60 Hz. How long will the current, starting from zero, take to reach the peak value ?

Options

  1. A1 120 s
  2. B1 60 s
  3. C1 30 s
  4. D1 240 s

Correct answer

D. 1 240 s

Step-by-step solution

The alternating current is given by I = I₀ ( t) . The time taken to reach the peak value from zero corresponds to a phase angle of 2 . t = 2 2 f t = 2 t = 1 4f Given f = 60 Hz, we get: t = 1 4 60 = 1 240 s. Answer: 1 240 s

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