A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field?
A) 10 mJ B) 2.0 mJ
C) 20 mJ D) none of the given answers
D
You might also like to view...
Why is the production of iron important for understanding the explosion of massive stars?
What will be an ideal response?
What nuclear fusion mechanism does an isolated white dwarf use to generate energy?
a. proton-proton chain b. CNO cycle c. triple alpha process d. white dwarfs don't generate their own energy.
When water is turned on in a shower, the shower curtain moves towards the water spray. This partly involves
A) capillary action. B) surface tension. C) pressure changes in moving fluids. D) none of the above
Each of two parallel wires separated by 6.0 mm carries a 40-A current. These two currents are in the same direction. Determine the magnitude of the magnetic field at a point that is 5.0 mm from each of the wires
a. 2.6 mT b. zero c. 1.9 mT d. 1.6 mT e. 3.2 mT