When a current is induced by a changing magnetic field B1, the current always produces a second magnetic field B2 such that
A. B1 and B2 completely cancel each other out.
B. B1 and B2 combine to give a weaker magnetic field than B1 alone.
C. B1 and B2 combine to give a stronger magnetic field than B1 alone.
D. It is not possible to tell whether the combined field is stronger or weaker than B1 without knowing how B1 is changing
Answer: D
You might also like to view...
Will our Sun become a supernova? Why?
What will be an ideal response?
Cometary impacts with Jupiter
A) are impossible to observe from Earth. B) are spectacular but do not teach us much. C) have been observed from Earth at least twice. D) are extremely rare. E) would not be catastrophic if they happened on Earth.
A 4.0-kg block is pushed up a 36° incline by a force of magnitude P applied parallel to the incline. When P is 31 N, it is observed that the block moves up the incline with a constant speed. What value of P would be required to lower the block down the incline at a constant speed?
a. 27 N b. 15 N c. 13 N d. 17 N e. 19 N
An airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop