Quiz 10 A long straight wire carrying a 3.0 A current enters a room through a window 1.5m high and 1.0m wide. The path integral B •d s around the window frame has a value (in T m) a) 0.20 b) 2.5 x 10 -7 c) 3.0 x 10 -7 d) 3.8 x 10 -6
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2) Two parallel wires carrying currents of 10A attract each other witha force of1 x 10-3N. What is the force if both currents are doubled.
3) Solenoid-A has twice the radius and six times the number of turns per unit length as Solenoid-B. The current in Solenoid-A is ia while the current in Solenoid-B is ib. What current ratioib /iashould be usedif the interior magnetic fields in both solenoids are required to be equal ??