Problem 1.
Two long straight wires carrying the same current I and separated by a distance r exert a force F on each other. The current is increased to 4I and the separation is reduced to r/6 . What will be the force between two wires?
Solution
Problem 2.
Two long straight wires carrying the same current 15 A exert a force of 0.001 N per unit length on each other. What is the distance between the wires?
Solution
Problem 3.
The magnetic field strength at a distance of 5 cm from a thin, straight wire is 0.00005 T. What is the current in the wire?
Solution
Problem 4.
At what distance from a thin, straight wire the magnetic field strength is 0.000025 T? The current in the wire is 15 A.
Solution
Problem 5.
The magnetic field at the center of a 2cm diameter loop is 0.0005 T. What is the current in the loop?
Solution
Problem 6.
Find the magnetic field strength and its direction at point P.
Solution
Problem 7.
What is the magnetic field strength and its direction at point P?
Solution
Problem 8.
Find the strength and the direction of the magnetic field at point P.
Solution
Problem 9.
Find the direction and the strength of the magnetic field at point P.
Solution
Problem 10.
Find the direction and the strength of the magnetic field at point P for the system of wires shown in the figure.
Solution
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