MCQ
When NPN transistor is used as an amplifier
- AElectrons move from base to emitter
- ✓Electrons move from emitter to base
- CElectrons moves from base to emitter
- DHoles moves from base to emitter
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If the charge $q_A$ is slowly moved inside the shell, then choose the statement$(s)$



$(A)$ The electric flux through the shell is $\sqrt{3} R \lambda / \in_0$
$(B)$ The z-component of the electric field is zero at all the points on the surface of the shell
$(C)$ The electric flux through the shell is $\sqrt{2} R \lambda / \in_0$
$(D)$ The electric field is normal to the surface of the shell at all points