in a circuit a metallic wire is connected in series with a battery and a ammeter .if another wire same length is connected in parallel to a mettalic wire the current in ammeter is

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$L e t t h e i n i t i a l c u r r e n t b e I . L e t t h e r e s i s \tan c e o f t h e w i r e b e R . L e t t h e e m f o f b a t t e r y b e V V = I R N o w w h e n a n i d e n t i c a l w i r e i s c o n n e c t e d t h e n, r e s i s \tan c e b e c o m e R' = \frac{R . R}{R + R} = \frac{R}{2} N e w c u r r e n t I' = \frac{V}{\frac{R}{2}} = 2 \frac{V}{R} = 2 I$

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in a circuit a metallic wire is connected in series with a battery and a ammeter .if another wire same length is connected in parallel to a mettalic wire the current in ammeter is

Let the initial current be I. Let the resistance of the wire be R. Let the emf of battery be VV=IRNow when an identical wire is connected then, resistance become R'=R.RR+R=R2New current I'=VR2=2VR=2I