In the figure shown, each resistor is of `20 Omega` and the cell has emf 10 volt with negligible internal resistance. Then rate of joule heating in the circuit is (in watts)

In the circuit shown in fig. the cell has emf 10V and internal resistance 1 Omega

In the circuit shown in fig. the cell has emf 10V and internal resistance 1 Omega

Figure showns a network of eight resistors numbered 1 to 8, each equal to 2 Omega , connected to a 3 V battery of negligible internal resistance. The current l in the circuit is