A particle of charge $q$ and velocity $v$ passes undeflected through a space with non-zero electric field $E$ and magnetic field $B$. The undeflecting conditions will hold if.
A particle of charge $q$ and velocity $v$ passes undeflected through a space with non-zero electric field $E$ and magnetic field $B$. The undeflecting conditions will hold if.
- A
signs of both $q$ and $E$ are reversed.
- B
signs of both $q$ and $B$ are reversed.
- C
both $B$ and $E$ are changed in magnitude, but keeping the product of $|B|$ and $|E|$ fixed.
- D
both $B$ and $E$ are doubled in magnitude.
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- [JEE MAIN 2016]
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- [AIPMT 2015]