When 5V potential difference is applied across a wire of length 0.1 m, the drift speed of electron a `2.5 times 10^-4m//s` IF the electron density in the wire is `8 times 10^28 m^-3` , the resistivity of the material of wire.

When 5V potential difference is applied across a wire of length 0.1 m, the drift speed of electron a 2.5 times 10^-4 m.s^-1 . IF the electron density in the wire is 8 times 10^28 m^-3 , the resistivity of the material is close to

A potential difference of 5 V is applied across a conductor of length 10 cm. If drift velocity of electrons is 0.00025 m/s, then what is the electron mobility?

5V potential difference is applied to a conductor of Length 10cm.If the drift velocity be 2.5 xx10^-2cm/s , then what will be its mobility?

When a load of 10 kg is hung from one end of a wire of length 5 m, the wire elongates by 5 mm. IF the young modulus for the material of the wire is 9.8 times 10^10 N.m^-2 , then find the area of cross section of the wire. [g=9.8 m.s^-2 ]

An electric cell of e.m.f E is connected across a copper wire of diameter d and length l. The drift velocity of electrons in the wire is v_(d) . If the length of the wire is changed to 2l, the new drift velocity of electrons in the copper wire will be

When a tensile force of 60 N is applied to a metal wire of length 50 m and ara of cross- section 10^(-6)m^(2) , elengation of the wire is 4xx10^(-3) m. calculate (i) stress and (ii) strain.

The length of a wire is 10 m and the diameter is 2 mm . If the resistivity of substance of the wire is 2 xx 10^(-6) ohm . Then the resistance of the wire is

Define mobility of free electrons. A potential difference of 5 volts is applied across a conductor of length 10 cm Find the mobility of an electron if he drift velocity of an electron is 2.5xx10^-2 cms.

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. The current through unit cross section of a conductor,called the electric current density J, is related with the applied electric field E as