The main difference between an incandescent bulb and a fluorescent bulb is that the incandescent bulb
A) uses electromagnetic radiation to heat a wire, while a fluorescent bulb uses magnetic fields to heat a gas.
B) sends an electric current through a gas while the fluorescent bulb heats a thin wire electrically.
C) uses electric current to heat a wire, while a fluorescent bulb sends an electric current through a gas.
D) heats a wire by sending an electric current through it, while the fluorescent heats a solid powdery material by sending a current through it.
E) heats a wire by sending an electric current through it, while a fluorescent bulb uses magnetic fields to heat a gas.
C
You might also like to view...
The star Vega has an apparent visual magnitude of 0.03 and the star HR 4374 has an apparent visual magnitude of 4.87 . It has been determined that both stars are at the same distance from Earth. What does this information tell us about the two stars?
a. Vega must be closer to Earth than HR 4374. b. Vega must be farther from Earth than HR 4374. c. Vega must produce less energy per second than HR 4374. d. Vega must produce more energy per second than HR 4374. e. Vega will appear fainter to us than HR 4374.
Fraunhofer was the German astronomer who first noted ________ lines in the Sun's spectrum
Fill in the blank(s) with correct word
An object and a screen are separated by 15.0 cm. A convex lens is placed between them, 6.82 cm from the object. In this position it causes a sharp image of the object to form on the screen. What is the focal length of the lens?
a. 4.69 cm b. 41.0 cm c. 3.72 cm d. 12.5 cm e. 4.09 cm
Force on a Moving Charge: An electron moves with a speed of 8.0 × 106 m/s along the +x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x-axis and lying in the xy-plane. Calculate the magnitude of the acceleration of the electron. (e = 1.60 × 10-19 C, me1 = 9.11 × 10-31 kg)
A. 1.3 × 1018 m/s2 B. 3.0 × 1018 m/s2 C. 1.3 × 10-18 m/s2 D. 3.0 × 10-18 m/s2 E. 0 m/s2