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GUJCET · Physics · Electromagnetic Induction
In an AC generator, induced \(\operatorname{emf} \varepsilon=0\) at \(t =0\), then its value ___________ .
- A minimum at time \(\frac{2 \pi}{3 \omega}\)
- B minimum at time \(\frac{\pi}{2 \omega}\)
- C maximum at time \(\frac{2 \pi}{\omega}\)
- D maximum at time \(\frac{\pi}{2 \omega}\)
Answer & Solution
Correct Answer
(D) maximum at time \(\frac{\pi}{2 \omega}\)
Step-by-step Solution
Detailed explanation
Given \(\varepsilon=0\) at \(t=0\), the induced emf is \(\varepsilon = \varepsilon_0 \sin(\omega t)\). Emf is maximum when \(\sin(\omega t) = 1\).
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