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A uniform electric field and uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron
Options
(a) will turn towards right of direction of motion
(b) speed will decrease
(c) speed will increase
(d) will turn towards left direction of motion
Correct Answer:
speed will decrease
Explanation:
v⃗ and B⃗ aer in same direction so that magnetic force on electron becomes zero, only electric force acts. But force on electron due to electric field is opposite to the direction of 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
- The sodium nucleus ₁₁Na²³ contains
- The de-broglie wavelength of an electron in 4th orbit is
- A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- A long solenoid has 500 turns. When a current of 2 ampere is passed through it
- A wire of length 1 m is moving at a speed of 2 ms⁻¹ perpendicular to its length
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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