KVPY2017PhysicsMagnetic Effects of Current
A rectangular region of dimensions w l( w
Options
- AIons with q > 2| v | m B ² w ² will hit the screen.
- BIons with q < 2| v | m B ² w ² will hit the screen.
- CAll ions will hit the screen.
- DOnly ions with q= 2|v| m B² w² will hit the screen.
Correct answer
B. Ions with q < 2| v | m B ² w ² will hit the screen.
Step-by-step solution
Ions will hit if r > W . array l w = q V 1 2 mv ²= q V v = 2 qV m mv ² r = qvB array aligned r &= mv qB = m qB 2 q V m r = 1 ~B 2 mV q & 1 ~B 2 mV q > w & 2 mV q > w ² ~B ² q & < 2 mV w ² ~B ² aligned