Use the data of Fig.(a). The current i in the circuit of Fig.(b) is

The Thevenin equivalent voltage V_TH appearing between the terminals A and B of the network shown in Fig. is given by

The value of R (in ohms) required for maximum power transfer in the network shown in Fig. is

In the circuit of figure, when switch S1 is closed, the ideal ammeter M₁ reads 5A. What will be ideal voltmeter M₂ read when S₁ is kept open? (The value of E is not specified).