Solenoid: An ideal solenoid that is 34.0 cm long is carrying a current of 2.00 A. If the magnitude of the magnetic field generated at the center of the solenoid is 9.00 mT, how many turns of wire does this solenoid contain? (?0 = 4? × 10-7 T ? m/A)
A. 860
B. 1590
C. 2320
D. 3180
E. 1220
Answer: E
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The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. In each figure the spacing d between the slits is the same. Which figure(s) represent(s) slits illuminated with light of the greatest wavelength ?? The white spaces represent the interference maxima.
A. I. B. II. C. III. D. IV. E. V.
A 24-nC charge is distributed uniformly along the x axis from x = 2 m to x = 6 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +8 m on the x axis?
A.
B.
C.
D.
E.
When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the VLT act as a(n) ________
Fill in the blank(s) with correct word
A resistor, inductor, and capacitor are connected in series, each with an effective (rms) voltage of 65 V, 140 V, and 90 V, respectively. What is the magnitude of the phase angle between the current and applied voltage phasors in this circuit?
a. 38° c. 22° b. 28° d. 43°