The distance between the plates of a charged parallel plate capacitor is \( 5 \mathrm{~cm} \) an...

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The distance between the plates of a charged parallel plate capacitor is \( 5 \mathrm{~cm} \) and electric field inside the plates is \( 200 \mathrm{Vcm}^{-1} \). An uncharged metal bar of width \( 2 \mathrm{~cm} \) is fully immersed into the capacitor. The
P length of the metal bal is same as that of plate of capacitor. The voltage across capacitor after the

W immersion of the bar is
(A) zero
(B) \( 400 \mathrm{~V} \)
(C) \( 600 \mathrm{~V} \)
(D) \( 100 \mathrm{~V} \)
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