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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
- If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy
- At place on earth, the vertical component of earth’s magnetic field is √3 times
- If v is the speed of sound in air, then the shortest length of the closed pipe
- Pascal-second has the dimensions of
- The physical quantity which does not have the same dimensions as the other three is
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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