The magnetic field inside a circular loop of wire of radius 30 cm increases at a constant rate from 2.0 × 10^–3 T to 3.5 × 10^–3 T in 0.47 s. What is the induced emf in the wire?
a. 9.0 ×10–4 V b. 2.3 ×10–4 V
c. 1.8 ×10–3 V d. 1.8 ×10–4 V
a
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Fusion of degenerate hydrogen on the surface of a white dwarf causes temperatures to reach millions of degrees and the density tens of thousands the density of water releasing enough energy to blow the surface layers, resulting in a(n) _______________
Fill in the blank(s) with correct word
A nonconducting sphere of radius 10 cm is charged uniformly with a density of 100 nC/m3. What is the magnitude of the potential difference between the center and a point 4.0 cm away?
A. 12 V B. 6.8 V C. 3.0 V D. 4.7 V E. 2.2 V
Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. How large is the shift in wavelength?
A) 2 nm B) 0.2 nm C) 0.02 nm
The nucleus of an atom is composed of protons and neutron held together by the
a. binding energy. b. strong nuclear force. c. fusion. d. fission.