Title: A 2.0-cm length of wire centered on the origin carries a 20-A current directed in the positive y ... Post by: jnote01 on Feb 23, 2018 A 2.0-cm length of wire centered on the origin carries a 20-A current directed in the positive y direction. Determine the magnetic field at the point x = 5.0 m on the x-axis.
a. 1.6 nT in the negative z direction b. 1.6 nT in the positive z direction c. 2.4 nT in the negative z direction d. 2.4 nT in the negative z direction e. None of the above [Ques. 2] The Greek astronomer who assigned the stars to six magnitudes was named ______________. Fill in the blank(s) with correct word [Ques. 3] When the energy state of an atom changes by E, the frequency of the photon emitted or absorbed is calculated by dividing E by ______________. Fill in the blank(s) with correct word [Ques. 4] Two long parallel wires each carry a current of 5.0 A directed to the east. The two wires are separated by 8.0 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires? a. 72 T b. 48 T c. 24 T d. 96 T e. 32 T [Ques. 5] On the H-R diagram, the Sun lies on the ______________. Fill in the blank(s) with correct word [Ques. 6] Niels Bohr postulated that the hydrogen electron radiates energy only when it makes a(n) ______________ from one allowed orbit to another. Fill in the blank(s) with correct word [Ques. 7] One long wire carries a current of 30 A along the entire x axis. A second long wire carries a current of 40 A perpendicular to the xy plane and passes through the point (0, 4, 0) m. What is the magnitude of the resulting magnetic field at the point y = 2.0 m on the y axis? a. 4.0 T b. 5.0 T c. 3.0 T d. 7.0 T e. 1.0 T [Ques. 8] The stars of highest photospheric temperature are those of spectral class ______________. Fill in the blank(s) with correct word [Ques. 9] Niels Bohr reasoned that a discrete line spectrum must be the result of a(n) ______________ effect. Fill in the blank(s) with correct word [Ques. 10] A car with a radio antenna 1.0 m long travels at 80 km/h in a locality where the Earth's magnetic field is 5.0 105 T. What is the maximum possible emf induced in the antenna as a result of moving through the Earth's magnetic field? Title: A 2.0-cm length of wire centered on the origin carries a 20-A current directed in the positive y ... Post by: kirandk on Feb 23, 2018 Content hidden
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