Please solve the 28 number.
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Q.28. The circuit diagram in Fig. 8.53 shows three resistors 2 , 4 , and R connected to a battery of e.m.f. 2 V and internal resistance 3 . If main current of 0.25 A flows through the circuit, find :
(a) the p.d. across the 4 resistor,
(b) the p.d. across the internal resistance of the cell,
(c) the p.d. across the R or 2 resistor, and
(d) the value of R.
Ans. (a) 1 V (b) 0.75 V (c) 0.25 V (d) 2