A wire contains a steady current of 2 A. The number of electrons that pass a cross section in 2 s is:
A) 2
B) 4
C) 6.3 × 1018
D) 1.3 × 1019
E) 2.5 × 1019
E) 2.5 × 1019
You might also like to view...
A square loop of wire has a current going around it. The magnetic field from the current on each side of the loop results in a magnetic force on the wire on the opposite side. Each resulting magnetic force on the opposite side wire
a. pushes inward on the loop. b. is actually zero since a current cannot push on itself. c. depends on whether the current is clockwise of counterclockwise. d. pushes outward on the loop.
Which sugar is found in greater than normal amounts in the blood of a diabetic?
a. Sucrose b. Lactose c. Glucose d. Fructose
A uniform rod (length = 2.0 m) is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through the rod at a point 0.50 m from one end of the rod. If the rod is released from rest in a horizontal position, what is the angular speed of the rod as it rotates through its lowest position?
a. 3.5 rad/s b. 3.8 rad/s c. 4.1 rad/s d. 2.0 rad/s e. 5.6 rad/s
What is a CCD, and how does it work? Why is it replacing film?
What will be an ideal response?