What is (a) the highest, (b) the lowest total resistance that can be secured by combinations of four coils of resistance `4 Omega , 8 Omega , 12 Omega , 24 Omega `?

How can three resistors of resistances 2 Omega, 3 Omega , and 6 Omega be connected to give a total resistance of (a) 4 Omega , (b) 1 Omega ?

Show how you would connect three resistors, each of resistance 6 Omega , so that the combination has a resistance of (i) 9 Omega , (ii) 4 Omega .

Judge the equivalent resistance when the following are connected in parallel – (a) 1 Omega and 10^6 Omega , (b) 1 Omega and 10^3 Omega , and 10^6 Omega .

The equivalent resistance between points A and B of an infinite network of resistance each of 1 Omega connected as shown is

What length of the wire (specific resistance 48 xx 10^(-8)Omega-m ) is needed to make a resistance of 4.2Omega ?

(a) Three resistors 2 Omega 4 Omega and 5 Omega are combined in parallel. What is the total resistance of the combination ? (b) If the combination is connected to a bettery of emf 20 V and neglibible internal resistance, determine the current through each resistor, and the total current drawn from the battery.