Diagram below shows a hypothetical magnetic field in a certain region of empty space where the electric field is constant in time. 
Which of the fields are physically impossible and why?
A. This field violates the Ampere-Maxwell law.
B. This field violates Gauss’s law for the magnetic field.
C. The field violates both of the above laws.
D. This field is physically possible.
B. This field violates Gauss’s law for the magnetic field.
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For general projectile motion if we neglect air, the vertical component of a projectile's acceleration
A) is always zero. B) remains a non-zero constant. C) continuously increases. D) continuously decreases. E) first decreases and then increases.
A spaceship, moving away from the Earth at a speed of 0.9c, fires a light beam backward. An observer on Earth would see the light arriving at a speed of
A. 0.1c. B. 1.9c. C. more than 0.1c but less than c. D. c. E. more than c but less than 1.9c.
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with
the eyepiece adjusted for minimum eyestrain. The near-point distance of the person using the microscope is 25.0 cm. What is the final magnification of the microscope? A) -190 B) -240 C) -300 D) -310 E) -470
In a Young's experiment, the paths from the slits to a point on the screen differ in length, causing constructive interference at the point. Which of the following path differences would cause this constructive interference?
a. 5l/2 c. 3l/4 b. 3l d. None of these choices.