A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?
A. 2.8
B. 1.7
C. 1.3
D. 4.0
E. 1.0
Answer: C
You might also like to view...
In the fission theory of the Moon's origin
a. the Moon broke from a rapidly spinning Earth b. the Earth and its Moon formed from the same cloud of matter c. the Moon formed elsewhere in the solar nebula and was later captured by Earth. d. the Moon formed when a very massive planetesimal smashed into the young Earth.
An electron moves with a constant horizontal velocity of 3.0 × 106 m/s, and no initial vertical velocity as it enters a deflector inside a TV tube
The electron strikes the screen after traveling 17.0 cm. horizontally and 40.0 cm vertically upward with no horizontal acceleration. What is the constant vertical acceleration provided by the deflector? (The effects of gravity can be ignored.) A) 2.5 × 1014 m/s2 B) 8.3 × 102 m/s2 C) 1.4 × 104 m/s2 D) 1.2 × 1014 m/s2
If an electric toaster operating on 120 volts draws a current of 6 amperes, the resistance of the toaster is 20 ohms
a. True b. False Indicate whether the statement is true or false
When the temperature of a material is increased, the _____________of the lattice vibrations increases.
Fill in the blank(s) with the appropriate word(s).