H2P-449
Faraday’s law
H2 Physics · JC 2 · Medium · Faraday’s law
In a velocity selector, charged particles move through perpendicular electric and magnetic fields. The electric field strength is increased from 2.5 kV m⁻¹ to 3.0 kV m⁻¹, while the magnetic flux density remains at 0.020 T. What is the new speed of particles that pass straight through undeflected?
(Use the condition for velocity selection.)
(Use the condition for velocity selection.)
- 1.5 × 10⁵ m s⁻¹
- 1.3 × 10⁵ m s⁻¹
- 6.7 × 10⁴ m s⁻¹
- 4.0 × 10⁴ m s⁻¹
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