Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT 2013
Exam
BITSAT
Year
2013
Subject
Physics
Chapter
Magnetic Effects of Current

BITSAT 2013 · Physics · Magnetic Effects of Current

A uniform electric field and uniform magnetic field are acting...

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

  1. Awill turn towards right of direction of motion
  2. Bspeed will decrease
  3. Cspeed will increase
  4. Dwill turn towards left direction of motion

Correct answer

B. speed will decrease

Step-by-step solution

v→\overrightarrow{\mathrm{v}} and B→\overrightarrow{\mathrm{B}} are 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.
Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

The straight wire A B carries a current I . The ends of the wire subtend angles θ_1 and… BITSAT 2024A long straight wire of radius a carries a steady current 1. The current is uniformly… BITSAT 2024The electrostatic force ( F_1) and magnetic force ( F_2) acting on a charge q moving with… BITSAT 2024The magnetic moments associated with two closely wound circular coils A and B of radius… BITSAT 2023A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 m long… BITSAT 2023A charge particle is moving in a uniform magnetic field (2 i +3 j ) T . If it has an… BITSAT 2023The magnetic moment of an electron (e) revolving in an orbit around nucleus with an… BITSAT 2023A proton moving with a velocity 3 × 10^ 5 m / s enters a magnetic field of 0.3 tesla at… BITSAT 2021 Full Magnetic Effects of Current list All BITSAT PYQs