An AC series circuit has 16.5 ? resistance, 12.8 ? inductive reactance and 8.27 ? capacitive reactance. If an effective (rms) emf of 145 V is applied, what is the effective (rms) current value?
a. 7.56 A
b. 8.47 A
c. 0.495 A
d. 23.7 A
e. 6.89 A
b
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Single-Slit Diffraction: A beam of light of wavelength 600 nm passes through a slit that is 3.1 × 10-5 m wide, and then goes on to a screen that is 2.2 m from the slit. On the screen, how far is the second dark fringe from the center of the diffraction pattern?
A. 3.9 cm B. 4.2 cm C. 6.3 cm D. 2.1 cm E. 8.5 cm
Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
a. 40 hrs b. 25 hrs c. 50 hrs d. 65 hrs e. 50000 hrs
The number of sunspot cycles in a solar magnetic cycle is ___________
Fill in the blank(s) with correct word
A current element (length = 1.0 cm) lies along the x axis with its center at x = 0 and carries a 20-A current in the positive x direction. Consider only the field of this current element and decide which combination of the following statements is correct. 1. The field at (0, 0, 1.0 m) is in the positive z direction. 2. The field at (0, 1.0 m, 0) is in the negative y direction. 3. The field at
(1.0 m, 0, 0) is zero. 4. The field at (0, 0, 1.0 m) is in the negative y direction. a. 3 and 4 b. 1 and 3 c. 2 and 4 d. 1 and 2 e. None of these