Q: As shown in figure, a simple harmonic motion oscillator having identical four springs has time period

(a) $\displaystyle T = 2\pi \sqrt{\frac{m}{4 k}} $

(b) $\displaystyle T = 2\pi \sqrt{\frac{m}{2 k}} $

(c) $ \displaystyle T = 2\pi \sqrt{\frac{m}{ k}} $

(d) $ \displaystyle T = 2\pi \sqrt{\frac{2m}{k}} $

Ans: (c)