An electron moves on a straight line path XY as shown. The abcd is a coil adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?

• A

  adcb.
• Correct answer
  B

  the current will reverse its direction as the electron goes past the coil.
• C

  no current induced.
• D

  abcd.

Solution

When ${\mathrm{e}}^{-}$ comes closer the induced current will be anticlockwise

When ${\mathrm{e}}^{-}$ comes farther induced current will be clockwise.

Hence, the correct answer is option: 'B'.