1.

(A) : The electron passing parallel to both magnetic and electric field is always deflected from its path (R) : If velocity of electrons is equal to ratio of magnetic and electric field in crossed fields applied then electron beam remains undeflected.

Answer»

Both 'A' and 'R' are TRUE and 'R' is the CORRECT explanation of 'A'.
Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
'A' is true and 'R' is FALSE
'A' is false and 'R' is false

Answer :D


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