A net force exerted on an object opposite to the object's direction of motion decreases it speed and its kinetic energy
Indicate whether the statement is true or false
TRUE
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Which one of the following choices is not one of Kirchoff's rules?
a) junction rule b) emf rule c) loop rule d) slide rule e) resistance rule
If the frequency of the AC voltage across an inductor is doubled, the inductive reactance of that inductor
A) decreases to one-half its original value. B) increases to twice its original value. C) decreases to one-fourth its original value. D) increases to 4 times its original value.
When a gun is fired, which has the greater kinetic energy: the bullet or the recoiling gun?
What will be an ideal response?
A thin copper rod that is 1.0 m long and has a mass of 0.050 kg is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?
A) 1.2 A B) 7.6 A C) 2.5 A D) 4.9 A E) 9.8 A