A particle is moving at 0.75c relative to a lab on Earth. By what percentage is the Newtonian expression for its momentum in error? (The percentage error is the difference between the erroneous and correct values, divided by the correct one)
A) 34%
B) 28%
C) 38%
D) 43%
Answer: A
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Two cables of the same length are made of the same material, except that one cable has twice the diameter of the other cable
When the same potential difference is maintained across both cables, which of the following statements are true? (There may be more than one correct choice.) A) The electrons have the same drift velocity in both cables. B) The same current flows through both cables. C) Both cables carry the same current density. D) The current in the thin cable is four times as great as the current in the thick cable. E) The current in the thin cable is twice as great as the current in the thick cable.
A beam of electrons is accelerated through a potential difference of 10 kV before entering a region having uniform electric and magnetic fields that are perpendicular to each other and perpendicular to the direction in which the electron is moving
If the magnetic field in this region has a value of 0.010 T, what magnitude of the electric field is required if the particles are to be undeflected as they pass through the region? A) 2.3 × 103 V/m B) 7.9 × 103 V/m C) 5.9 × 105 V/m D) 6.0 × 105 V/m E) 7.2 × 106 V/m
A light beam having a wavelength of 470 nm in air is directed into glycerine at an angle of 75.0° with the normal in air
Glycerine has a refractive index of 1.47. (c = 3.0 × 108 m/s) (a) What are the frequency and wavelength of the light in the glycerine? (b) What angle does the light beam make with the normal in the glycerine?
Which ray diagram is correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens
a.
A
b.
B
c.
C
d.
D
e.
E