[" 8.A metal wire of area of cross-section "],[1.8times10^(-7)m^(2)" and specific resistance "],[9times10^(-6)Omega-m" is bent into a square loop and "],[" moved with a constant speed in a uniform "],[" magnetic field of induction "2Wb/m^(2)" .What "],[" should be the speed of loop so that a current of "],[3mA" passes through it? "]

A copper wire of length 2 m and area of cross-section 1.7xx10^(-6)m^(2) has a resistance of 2xx10^(-2)Omega. The resistivity of copper is

A wire of length 0.1 m moves with a speed of 10 m s^-1 perpendicular to a magnetic field of induction 1 Wb m^-2 . What is the value of induced e.m.f.?

A copper wire of length 2m and area of cross-section 1.7 xx 10^(-6)m^(2) has a resistance of 2 xx 10^(-2) ohms. Calculate the resistivity of copper.

The resistance of 300 m long wire with cross-sectional area 10^(-6)m^2 and resistivity 10^(-7) Omegam is …………… .

A square metal wire loop of side 20 cm and resistance 2Omega is moved with a constant velcoity v_(0) in a uniform magnetic field of induction B = 1 Wb//m^(2) as shown in the figure. The magnetic field lines are perpendicular to the plane of the loop. The loop is connected to a network of resistance each of value 5Omega . The resistances of the lead wires BF and AE are negligible. What should be the speed of the loop, so as to have a steady current of 2 mA in the loop? Give the direction of current in the loop.