Combination of Resistance

(a) what is meant by series and parallel combination of resistances ? (b) in which case, series combination or parallel combination, the combined resistance is less than any of the individual resistances ? (c ) How should two resistance of 2 Omega each be connected so as to produce an equivalent resistance of 1 Omega ? In the circuit diagram given here , find: (i) total resistance of the circuit (ii) total current flowing in the circuit, and (iii) the potential difference across R_(1)

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

The resistance of a series combination of the resistance is S. when they are joined in parallel equvalent resistance is P. Find the value of ((S)/(2P))

The equivalent resistance of a series combination of two resistances is X ohm. If the resistance are of 10 ohm and 40 ohm respectively, the value of X will be

The resistance of the series combination of two resistances is S. When they are joined in parallel the total resistance is P. If S= nP then the minimum possible value of n is

A carbon and an aluminium wire are connected in series. If the combination has resistance of 30Omega at 30^@C , what is the resistance of each wire at 0^@C so that resistance of the combination does not change with temperature. (a_c=-0.5 times 10^-3//^@C,a_A=4 times 10^-3//^@C )