12.2 Problems
539
12.2 If a copper wire is stretched to make it 0.1% longer, what is the percentage
change in its resistance?
[Indian Institute of Technology 1978]
12.3 The equivalent resistance of the series combination of two resistors is p. When
they are joined in parallel, the equivalent resistance is q. If p = nq, find the
minimum possible value of n.
12.4 Five resistors are connected as in Fig. 12.4. Find the equivalent resistance
between A and C.
Fig. 12.4
12.5 Five resistors are arranged as in Fig. 12.5. Find the effective resistance
between A and B.
Fig. 12.5
12.6 Each of the resistances in the network, Fig. 12.6, is equal to R. Find the resistance between the terminals A and B.
Fig. 12.6
539
12.2 If a copper wire is stretched to make it 0.1% longer, what is the percentage
change in its resistance?
[Indian Institute of Technology 1978]
12.3 The equivalent resistance of the series combination of two resistors is p. When
they are joined in parallel, the equivalent resistance is q. If p = nq, find the
minimum possible value of n.
12.4 Five resistors are connected as in Fig. 12.4. Find the equivalent resistance
between A and C.
Fig. 12.4
12.5 Five resistors are arranged as in Fig. 12.5. Find the effective resistance
between A and B.
Fig. 12.5
12.6 Each of the resistances in the network, Fig. 12.6, is equal to R. Find the resistance between the terminals A and B.
Fig. 12.6