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15. The distance between the plates of a...

15. The distance between the plates of a charged parallel plate capacitor is 5 cm and electric field inside the plates is 200 Vem '. An uncharged metal bar of width 2cm is fully immersed into the capacitor. The length of the metal bar is same as that of capacitor. The voltage across capacitor after the immersion of the bar is (A) zero (B) 400 V (C) 600 V (D) 100 V Celled with a medinm of dielectric constant 15. Another condenser B has

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