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A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move
Options
(a) in a circular orbit
(b) along a parabolic path
(c) along a straight line
(d) in an elliptical orbit.
Correct Answer:
in a circular orbit
Explanation:
If the electric field switched off, and the same magnetic field is maintained, the electrons move in a ciruclar orbit and electron will travel a magnetic field to its velocity.
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A person cannot see the objects clearly placed at a distance more than 40 cm
- In an ammeter, 0.2% of main current passes through the galvanometer
- Three objects coloured black, gray and white can withstand hostile conditions upto 2800⁰C.
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
- A bullet loses 1/20 of its velocity after penetrating a plank.How many planks
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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