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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
- A block of mass 0.50 kg is moving with a speed of 2.00 ms⁻¹ on a smooth surface.
- A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion
- The total kinetic energy of a body of mass 10 kg and radius 0.5 m moving with a velocity
- Dependence of intensity of gravitational field (E) of earth with distance(r)
- A 1Ω resistance in series with an ammeter is balanced by 75 cm of potentiometer wire
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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