In the figure AB is a wire of uniform cross - section and resistance 8r. A is an ideal ammeter with a resistance r in series as shown in figure below. The cells are of Emf's E & 2E and internal resistance r and 0 respectively. Jockey J can be moved freely on wire AB making contact on wire at C , length of wire is 1 m. Consider ammeter to be capable of measuring current in either direction of flow. (given that E=20 V ; r=2Ω .Find the reading of ammeter when it shows maximum value: (Give integer value)

In the figure AB is a wire of uniform cross - section and resistance 8

1.	In the figure AB is a wire of uniform cross - section and resistance 8r. A is an ideal ammeter with a resistance r in series as shown in figure below. The cells are of Emf's E & 2E and internal resistance r and 0 respectively. Jockey J can be moved freely on wire AB making contact on wire at C , length of wire is 1 m. Consider ammeter to be capable of measuring current in either direction of flow. (given that E=20 V ; r=2Ω .Find the reading of ammeter when it shows maximum value: (Give integer value)
Answer» In the figure $AB$ is a wire of uniform cross - section and resistance $8 r$ . $A$ is an ideal ammeter with a resistance $r$ in series as shown in figure below. The cells are of Emf's $E & 2 E$ and internal resistance $r$ and $0$ respectively. Jockey $J$ can be moved freely on wire $AB$ making contact on wire at $C$ , length of wire is $1 m$ . Consider ammeter to be capable of measuring current in either direction of flow. (given that $E = 20 V; r = 2 Ω$ .Find the reading of ammeter when it shows maximum value: (Give integer value)