Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude F due to the other.
With time, charge gradually leaks off of both spheres. When each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be
A) 1/4 F. B) 1/8 F. C) 1/2 F. D) 1/16 F.
Question 2
A circular coil of wire of 200 turns and diameter 2.0 cm carries a current of 4.0 A. It is placed in a magnetic field of 0.70 T with the plane of the coil making an angle of 30 with the magnetic field. What is the magnetic torque on the coil?
A) 0.15 N m
B) 0.088 N m
C) 0.29 N m
D) 0.40 N m
E) 0.076 N m
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