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When the horizontaldeflecting plates of a CRO arekept -at the ground potentialand 30 V dc is applied to thevertical deflecting plates - thebright spot moves 1 cm awayfrom the centre. If with thesame setting - a 30 V ac isapplied to the verticaldeflecting plates - then thepicture observed on thescreen would be

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When the horizontaldeflecting plates of a CRO arekept -at the ground potentialand 30 V dc is applied to thevertical deflecting plates - thebright spot moves 1 cm awayfrom the centre. If with thesame setting - a 30 V ac isapplied to the verticaldeflecting plates - then thepicture observed on thescreen would be






 
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