A solid nonconducting sphere (radius = 12 cm) has a charge of uniform density (30 nC/m3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the center of the sphere
a. 22 N/C
b. 49 N/C
c. 31 N/C
d. 87 N/C
e. 26 N/C
d
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The loop is partway into the field (as shown).
A. forward (in the +x direction). B. backward (in the -x direction). C. zero. D. some other direction (specify).
Red light with a wavelength of 650. nm travels from air into a liquid with an index of 1.33. What is the frequency and wavelength in the liquid?
What will be an ideal response?
An iron nail is brought near a magnet. Which of these is not true?
a. The nail has a north pole and a south pole. b. The nail becomes a north pole or a south pole. c. The magnet exerts an attractive force on the nail. d. The nail exerts an attractive force on the magnet. e. The nail is ferromagnetic.
A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 39° with the normal. Find the angle of the ray reflected off the glass surface with respect to the normal
a. 56° c. 46° b. 25° d. 39°