Navigate

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.

AIPMT2011
admin:

Related Questions

  1. A radio isotope X with a half life 1.4 x 10⁹ years decays to Y which is stable
  2. For a cubic crystal structure which one of the following relations
  3. If (range)² is 48 times (maximum height)², then angle of projection is
  4. A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length
  5. A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined