A cylindrical wire of radius 0.5mm and conductivity `5times10^(7)`S/m is subjected to an electric field of 10mV/m .The expected value of current in the wire will be `x^(3)pi` mA .The value of x is

An electric current of 16 A exists in a metal wire of cross section 10^(-6)"M"^(2) and length 1m. Assuming one free electron per atom. The drift speed of the free electron in the wire will be (0.00x)m//s. Find value of x. ("Density of metal"= 5xx10^(3)"kg"//"m"^(3), "atomic weight"=60)

A uniform cylindrical wire is subjected to a longitudinal tensile stress of 5 xx 10^(7) N//m^(2) . Young's modulus of the material of the wire is 2 xx 10^(11) N//m^(2) . The volume change in the wire is 0.02% . The factional change in the radius is

A long cylindrical wire carrying current of 10 A has radius of 5 mm find its its magnetic field induction at a point 2 mm from the centre of the wire

An electric current of 16 A exists in a metal wire of cross section 10^(-6) m^(2) and length 1 m. Assuming one free electron per atom. The drift speed of the free electrons in the wire will be (Density of metal = 5 xx 10^(3) kg//m^(3) atomic weight = 60)

The resistance of an Carbon wire is 10 Omega . A current of 30 mA is flowing in it at 20^(0) C. If p.d. across its ends constant then its temperature is increased to 120^(0) C then the current flowing in the wire will be in mA ( alpha_(C)=5 xx 10^(-3)//^(0)C)

A wire of radius 10^(-3)m and length 2m is stretched by a force of 50 N. Calculate the fundamental frequency of the note emitted by it. Density of wire is 1.6. xx 10^(3)" kg m"^(-3) .

A square wire loop of side 30cm & wire cross section having diameter 4mm is placed perpendicular to a magnetic field changing at the rate 0.2 T/s. Final induced current in the wire loop. (Given: Resistivity of wire material is (1.23xx10^(-8) ohm m)

A copper wire has a square cross section of 6 mm on a side. The wire is 10 m long and carries a current of 3.6A. The density of free electrons id 8.5x10^(28)//m^3. Find the magnitude of (a) the current density in the wire , (b) the electric field in the wire. (c ) How much time is required for an electron to travel the length of the wire? ("rh, electrical resistivity, is" 1.72 xx10^(-8) Omegam.)

A long straight wire of radius 10mm carries a current uniformly distributed over its cross section. The ration of magnetic fields due to the wire at distance of 5mm and 15 mm, respectively from the axis of the wire is

A long straight wire of radius 10mm carries a current uniformly distributed over its cross section. The ration of magnetic fields due to the wire at distance of 5mm and 15 mm, respectively from the axis of the wire is