Two wires each of radius of cross-section r but of different material are connected together end to end (i.e. in series). If the densities of charge carriers in the two wires are in the ratio `1:4`, the drift velocioty of electrons in the two wires will be in the ratio:

Two wires each of radius of cross section r but of different materials are connected together end to end (in series). If the densities of charge carries in the two wires are in the ratio 1:4 , the drift velocity of electrons in the two wires will be in the ratio:

Two wires each of radius of cross section r but of different materials are connected together end to end (in series). If the densities of charge carries in the two wires are in the ratio 1:4 , the drift velocity of electrons in the two wires will be in the ratio:

Two different wires X and Y of same diameter but different materials are joined in series across a battery. If the number density of electrons in X is twice that in Y, find the ratio of drift velocity of electrons in the two wires .

Two steel wires of the same radius have their lengths in the ratio of 1:2 . If they are stretched by the same force, then the strains produced in the two wires will be in the ratio of

Two wires of equal cross section but one made of steel and the other of copper, are joined end to end. When the combination is kept under tension, the elongations in the two wires are found to be equal. Find the ratio of the lengths of the two wires. Young modulus of steel =2.0xx10^11Nm^-2 and that of copper =1.1xx10^11Nm^-2

Two wires of different linear mass densities are soldered together end to end and then stretched under a tension F . The wave speed in the first wire is thrice that in the second. If a harmonic wave travelling in the first wire is incident on the junction of the wires and if the amplitude of the incident wave is A = sqrt(13) cm , find the amplitude of reflected wave.

Two metallic wires of the same material B, have the same length out cross-sectional area is in the ratio 1:2. They are connected (i) in series and (ii) in parallel. Compare the drift velocities of electrons in the two wires in both the cases (i) and (ii) .

Two wires of different densities but same area of cross-section are soldered together at one end and are stretched to a tension T . The velocity of a transverse wave in the first wire is double of that in the second wire. Find the ratio of density of the first wire to that of the second wire.

Two wires of the same material but of different diameters carry the same current i . If the ratio of their diameters is 2:1 , then the corresponding ratio of their mean drift velocities will be

An electric current is passed through a circuit containing two wires of the same material connected in parallel. If the lengths and radii of the wire are in the ratio (4)/(3) and (2)/(3) , then the ratio of the currents passing through the wires will be