Underlying the concept of self-induction is
A) Ohm's law.
B) Faraday's law.
C) Maxwell's law.
D) all of these about equally
Answer: B
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Graphical Addition: Vectors 
and 
obey the equation 
+ 
= 0. These vectors satisfy which one of the following statements?
A. Vectors 
and 
are at right angles to each other.
B. Vectors 
and 
point in the same direction.
C. Vectors 
and 
have the same magnitudes.
D. The magnitude of 
is the negative of the magnitude of 
.
A 100-m long wire carrying a current of 4.0 A will be accompanied by a magnetic field of what strength at a distance of 0.040 m from the wire? (magnetic permeability in empty space µ0 = 4p × 10^-7 T×m/A)
a. zero c. 2.0 × 10^-5 T b. 1.6 × 10^-5 T d. 4.0 × 10^-5 T
A 24-nC charge is distributed uniformly along the x axis from x = 2 m to x = 6 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +8 m on the x axis?
A.
B.
C.
D.
E.
A nucleus undergoes beta decay. Which of the following statements is true?
A. The daughter element has the same number of protons as the parent. B. The daughter element has fewer protons than the parent. C. Both daughter and parent elements have the same atomic number. D. The daughter element has more protons than the parent.