What is the magnitude of the magnetic field at point P in the figure if a = 2.0 cm, b = 4.5 cm, and I = 5.0 A?
A. 87 ?T, into the paper
B. 87 ?T, out of the paper
C. 0.23 mT, out of the paper
D. 0.23 mT, into the paper
E. 23 ?T, into the paper
Answer: A
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A. 1.66 B. 0.600 C. 0.660 D. 0.580 E. 1.65
Answer the following statement(s) true (T) or false (F)
1. Consider two q-vectors 
with possibly complex components. Their inner product 
is a real number.
2. The inner product of a vector with itself 
is a real number.
3. Consider two q-vectors 
with possibly complex components. Their inner product 
obeys the relation = 
4. Even though the observable Sy can only have the values 
, the expectation value 
can have any value between these two extremes.
Your weight is the force
A) due to gravity only. B) you exert against a supporting surface. C) equal to your normal force on any surface.
Which of the following wavelengths could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends?
a. 4 m b. 2 m c. 1 m d. 0.89 m e. 0.5 m