A circular coil (radius = 0.40 m) has 160 turns and is in a uniform magnetic field. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.16 N / m when the current in the coil is 4.0 mA. What is the magnitude of the magnetic field?
a. 0.37 T
b. 1.6 T
c. 0.50 T
d. 1.2 T
e. 2.5 T
c
You might also like to view...
Light reflects off the surface of Lake Superior. What phase shift does it undergo?
A) 0° B) 90° C) 180° D) 270° E) It does not undergo any phase shift.
2.36 × 108 is equal to _____
A) 23,600,000 B) 236,000,000 C) 2,360,000,000 D) 23,600,000,000
A red car has a head-on collision with an approaching blue car with the same magnitude of momentum. A green car driving with the same momentum as the other cars collides with an enormously massive wall
Which of the three cars will experience the greatest impulse? A) red car B) blue car C) green car D) all the same
Buoyancy: When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now read? The density of water is 1.0 g/cm3.
A. 120 g B. 122 g C. 138 g D. 140 g