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
Show Hint
- will turn towards the right direction of motion.
- speed will decrease.
- speed will increase.
- will turn towards the left direction of motion.
The Correct Option is B
Solution and Explanation
Step 1: Understand the motion of an electron in electric and magnetic fields.
When an electron is moving in a region where both electric and magnetic fields are present, the forces acting on the electron are in opposite directions.
Step 2: Conclusion.
Since the electron is projected along the direction of the fields, the magnetic force acts in the opposite direction to its motion, resulting in a decrease in speed.
Final Answer: \[ \boxed{\text{Speed will decrease.}} \]
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