Question

1. A cell of e.m.f. 2 V and internal resistance 1.2 12 18
connected to an ammeter of resistance 0.8 2 and two
resistors of 4.5 22 and 92 as shown in Fig. 8.56.
2 V
1 2 2
4.5 S2
0.8 12
(A
Fig. 8.56
9 92
Find :
(a) the reading of the ammeter,
(b) the potential difference across the terminals of
the cell, and
(c) the potential difference across the 4.5 2 resistor.
​

Answer 1

Answer:

$n(AUB) = n(A) + n(B) - n(AnB)n(AUC) =n(A) + n(C) - n(AnC)given that AUB = AUCtherefore, n(AUB) = n(AUC)Now, n(A)+n(B)-n(AnB)=n(A)+n(C) -n(AnC)given that, AnB=AnCTherefore,n(AnB)=n(AnC)Therefore, the equation becomen(A)+n(B)-n(AnB)=n(A)+n(C)-n(AnB)which becomes,n(B)=n(C)Which means these sets are equivalent i.e. same number of elements$

Explanation: