Faraday's Law: At a certain instant, coil A is in a 10-T external magnetic field and coil B is in a 1-T external magnetic field. Both coils have the same area and are oriented at right angles to the field. Which coil will have a greater emf induced in it?
A. coil A
B. coil B
C. It is impossible to know without more information about the fields.
Answer: C
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Velocity Selector: The figure shows a velocity selector that can be used to measure the speed of a charged particle. A beam of particles of charge +q is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E which is oriented perpendicular to a uniform magnetic field B. If the plates are separated by 3.0 mm and the value of the magnetic field is 0.30 T, what potential difference between the plates will allow particles of speed v = 5.0 × 105 m/s to pass straight through without deflection?
A. 450 V B. 1400 V C. 2800 V D. 140 V E. 70 V
What are the SI units of momentum?
a. kg m/s b. pascals c. joules d. watts
Fusion of hydrogen nuclei is the origin of solar energy
a. True b. False Indicate whether the statement is true or false
When a beam of light that is traveling in glass strikes an air boundary at the surface of the glass, there is
A) a 90° phase change in the reflected beam. B) no phase change in the reflected beam. C) a 180° phase change in the reflected beam. D) a 60° phase change in the reflected beam. E) a 45° phase change in the reflected beam.