Log in
Physics
1
answer
0
watching
61
views
23 Nov 2019

By carefully adjusting the strength and direction of an electric and magnetic field, you can build a "velocity selector", a device that deflects all charged particles except those with a very specific velocity. Describe how you'd arrange those fields and how they're adjusted to select charged particles with the speed v.

Watch
1
answer
0
watching
61
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Sixta Kovacek
Sixta KovacekLv2
9 Nov 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Figure P19.14a is a diagram of a device called a velocity selector, in which particles of a specific velocity pass through undeflected while those with greater or lesser velocities are deflected either upwards or downwards. An electric field is directed perpendicular to a magnetic field, producing an electric force and a magnetic force on the charged particle that can be equal in magnitude and opposite in direction (Figure P19.14b) and hence cancel. Show that particles with a speed of v=E/B will pass through the velocity selector undeflected.

Figure P19.14a is a diagram of a device called a velocity selector, in which particles of a specific velocity pass through undeflected while those with greater or lesser velocities are deflected either upwards or downwards. An electric field is directed perpendicular to a magnetic field, producing an electric force and a magnetic force on the charged particle that can be equal in magnitude and opposite in direction (Fig. P19.14b) and hence cancel. Show that particles with a speed of  will pass through the velocity selector undeflected.

Figure P19.14a is a diagram of a device called a velocity selector, in which particles of a specific velocity pass through undeflected while those with greater or lesser velocities are deflected either

In a mass spectrometer, a specific velocity can be selected from a distribution by injecting charged particles between a set of plates with a constant electric field between them and a magnetic field across them (perpendicular to the direction of particle travel). If the fields are tuned exactly right, only particles of a specific velocity will pass through this region undeflected. Consider such a velocity selector in a mass spectrometer with a 0.105 T magnetic field.

a) What electric field strength, in volts per meter, is needed to select a speed of 3.8 x 106 m/s?

b) What is the voltage, in kilovolts, between the plates if they are separated by 0.75 cm?

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in