What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m?
a. 0.18 T
b. 0.11 T
c. 0.15 T
d. 0.13 T
e. 0.23 T
d
You might also like to view...
Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. If the ratio of the applied forces P1/P2 5 5/2, the ratio of the joint B reactions RB1/RB2 is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
The kinetic energy of a proton is 80% of its total energy. What is the speed of the proton?
A) 0.02c B) 0.87c C) 0.92c. D) 0.98c E) 1.0c
Which of the following quantities is equal to the time constant for a charging capacitor?
a) the time it takes a capacitor to reach 33% of its maximum charge b) the time it takes a capacitor to reach 50% of its maximum charge c) the time it takes a capacitor to reach 66% of its maximum charge d) the time it takes a capacitor to reach 75% of its maximum charge e) the time it takes a capacitor to reach its maximum charge
The energy of a photon is _________ proportional to its frequency and __________proportional to its wavelength
Fill in the blank(s) with correct word