Two long parallel wires separated by 0.0350 m and the first wire carries 4.70 A. The magnetic field is zero between the two wires at a position 0.0130 m from the first wire. What is the current through the the second wire

If a simple machine reduces the strength of a force, what must be increased?

Explain why electric current cannot exist if a current doesn't have a voltage source.

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.