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...
The Flash, a comic superhero, is able to run close to the speed of light. Two people, with synchronized watches, stand several kilometers apart and time the Flash as he runs a straight course. The Flash has his own stopwatch and uses it to independently time his run. The Flash also observes the speed at which the finish line moves toward him, and upon finishing his run he calculates the length of the course by multiplying this speed by the time on his stopwatch. Who measures (I) the Flash's proper time for the race, and who measures (II) the rest or proper length for the race?
A. Both the Flash and the two people measure (I) and (II) B. Only the Flash measures both (I) and (II) C. The two people measure (I) and Flash measures (II) D. Neither the Flash nor the two people measure (I) or (II) E. The Flash measures (I) but the two people measure (II)
The main purpose of DST is to save ______________
Fill in the blank(s) with correct word
A geosynchronous satellite is one that stays above the same point on the Earth, which is possible only if it is above one of the Earth's poles
Indicate whether the statement is true or false
Free Fall: A foul ball is hit straight up into the air with a speed of 30 m/s, and air resistance is negligible.(a) Calculate the time required for the ball to rise to its maximum height.(b) Calculate the maximum height reached by the ball above the point where it hit the bat.(c) Determine the times at which the ball passes a point 25 m above the point where it was hit by the bat.(d) Explain why there are two answers to part (c).
What will be an ideal response?