Two point charges are fixed on the x-axis. Imagine moving a positive charge from point P to the origin along the different paths shown in the diagram. For which path would you do the most work?
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An ideal transformer supplies 100 kW of power to a 120 V circuit. If the input voltage is 10,000 V, what is the input current?
A. 1.20 mA B. 10.0 A C. 120 A D. 240 A E. 830 A
What is the meaning of the solar constant?
A) the regularity of the 11-year sunspot cycle B) the amount of energy the Earth receives per unit area and unit time C) the stability of the Sun's luminosity for as long as life has existed on Earth D) the fact that features on the Sun appear to never change E) the fact that the amount of hydrogen turning into helium in the core is fixed
Each plate of a parallel-plate air-filled capacitor has an area of 0.0020 m2, and the separation of the plates is 0.020 mm
An electric field of 3.9 × 106 V/m is present between the plates. What is the surface charge density on the plates? (?0 = 8.85 × 10-12 C2/N • m2) A) 35 µC/m2 B) 73 µC/m2 C) 17 µC/m2 D) 52 µC/m2 E) 87 µC/m2
Calculate the kinetic energy (in eV) of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 × 10-12 m. (h = 6.626 × 10-34 J ? s, mneutron = 1.675 × 10-27 kg, 1 eV = 1.60 10-19 J)
What will be an ideal response?