JEE WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
JEE WhatsApp Group
Join Our JEE Preparation Group
Prep with like-minded aspirants; Get access to free daily tests and study material.
The current flowing through an ac circuit is given by $$I = 5\sin(120\pi t)$$ A. How long will the current take to reach the peak value starting from zero?
Given: $$I = 5\sin(120\pi t)$$ A.
Comparing with the standard form $$I = I_0 \sin(\omega t)$$:
$$\omega = 120\pi \text{ rad/s}$$
The current starts from zero (at $$t = 0$$, $$I = 0$$) and reaches its peak value when $$\sin(120\pi t) = 1$$.
$$120\pi t = \frac{\pi}{2}$$
$$t = \frac{\pi}{2 \times 120\pi} = \frac{1}{240} \text{ s}$$
The correct answer is Option D.
Click on the Email ☝️ to Watch the Video Solution
Create a FREE account and get:
Educational materials for JEE preparation
Ask our AI anything
AI can make mistakes. Please verify important information.
AI can make mistakes. Please verify important information.
