MCQ
When $NPN$ transistor is used as an amplifier
- ✓Electrons move from base to collector
- BHoles move from emitter to base
- CElectrons move from collector to base
- DHoles move from base to emitter
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$(A)$ Incident ray and emergent ray are symmetric to the prism
$(B)$ The refracted ray inside the prism becomes parallel to its base
$(C)$ Angle of incidence is equal to that of the angle of emergence
$(D)$ When angle of emergence is double the angle of incidence
Choose the correct answer from the options given below
$(a)$ Shape of loop
$(b)$ Area of loop.
$(c)$ Current in loop
$(d)$ External magnetic field.
