A rectangular coil (0.20 m × 0.80 m) has 200 turns and is in a uniform magnetic field of 0.30 T. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.080 N / m. What is the current in the coil?
a. 5.0 mA
b. 1.7 A
c. 8.3 mA
d. 1.0 A
e. 42 mA
c
You might also like to view...
_______________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium
Fill in the blank(s) with correct word
Astronomers speculate that most galaxies have a massive black hole at their center. What could be the origin of the suspected black hole?
A. The gravitational attraction drew in stars from the disk. B. the collision of galaxies C. the rapid rotation of the galaxy that compressed material to high densities D. dark matter at the galactic center E. First, a supernova explosion formed a black hole, which in time became more massive by accretion.
Due to the vast scale of the universe, when we observe a star in the night sky, we are seeing it
A) not as it is now, but as it will be in the future B) as it was at the moment the universe formed C) as it is right now D) not as it is now, but as it was in the past
Has there ever been a situation in which a given quantity of matter was turned completely into non-material forms of energy?
A) Yes, in electron-positron pair production. B) Yes, in all three of the above types of experiments. C) Yes, in electron-positron annihilation. D) Yes, in nuclear fission and fusion. E) No, there must always be some matter left over.