Question:

A proton (or charged particular) moving with velocity ν is acted upon by electric field E and magnetic field B. The proton will move undeflected if

Options :

  • (a) E is perpendicular to B
  • (b) Ē is parallel to v and perpendicular to B
  • (c) E, B and v are mutually perpendicular and v
  • E and B both are parallel to v

Answer :

(c) E, B and v are mutually perpendicular and v

Answer Steps :

step 1:

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