A velocity selector in a mass spectrometer, like that shown in Figure 21.39, use

Question

A velocity selector in a mass spectrometer, like that shown in Figure 21.39, uses a 0.140 T magnetic field. Figure 21.39 (a) What electric field strength is needed to select a speed of 3.90 106 m/s? V/m (b) What is the voltage between the plates if they are separated by 1.00 cm? kV

A velocity selector in a mass spectrometer, like that shown in Figure 21.39, uses a 0.140 T magnetic field. Figure 21.39 (a) What electric field strength is needed to select a speed of 3.90 106 m/s? V/m (b) What is the voltage between the plates if they are separated by 1.00 cm? kV

Explanation / Answer

Part A)

Apply v = E/B

3.90 X 106 = E/.140

E = 5.46 X 105 V/m

Part B)

V = Ed

V = (5.46 X 105)(.01) = 5.46 X 103 V

That is 5.46 kV

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.