Three long wires of resistances in the ratio `3:4:5` are connected in parallel to each other as shown in figure. If net force on middle wire is zero then `((d1)/(d2))` will be

Two wires with resistances R and 2 R are connected in parallel, the ratio of heat generated in 2 R and R is

Two long wires are placed parallel to each other 10cm apart as shown in figure. The magnetic field at point P is

Two wires having resistance R and 2 R are connected in parallel, the ratio of heat generated in 2 R and R is

Six equal resistances each of 4 ohm are connected to form a net work as shown in figure . What is the resistance between A and B ?

Twelve resistors each of resistance 1 Omega are connected in the circuit shown in figure. Net resistance between point A and H would be

Four infinitely long wires carring equal currents are placed parallel and equidistant as shown in figure. Then magnitude of force

Three very long straight conductors are arranged parallel to each other in a plane and have resistances in the ration 1:2:3 . They are connected in parallel to a battery of negligible internal resistance such that the currents in all three wires are in the same direction. The distance between the first two conductors is x and the distance between the second and third conductors is y . If the middle conductors is in equilibrium, the ratio x:y is

Three wires whose lengths are in the ratio 3:8:18 and radii in the ratio 1:2:3 are connected in parallel. Find the ratio of the currents through them.

In the circuit shown in figure resistance of each wire is r. Net resistance across

Three wires each have resistance 2Omega , if we connect 2 in series with one parallel to the combination the equivalent resistance is