A uniform electric field and uniform magnetic field are acting along the same

⇦

⇨

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.

Related Questions:

1. The time period of a mass suspended from a spring is T. If the spring is cut into four
2. A layer of colourless oil spreads on water surface. White light is incident on it
3. A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle
4. Wavefront is the locus of all points, where the particles of the medium
5. A body of mass 0.5 kg travels in a straight line with velocity v=a x³/², where

Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends