Physics
Which conservation principle is applicable in the case of the motion of a rocket?

Conservation of charge
Conservation of mass
Conservation of momentum
Conservation of energy

ANSWER DOWNLOAD EXAMIANS APP

Physics
In a bipolar junction transistor

All the three regions (the emitter, the base and the collector) have equal concentrations of impurity
The emitter has the least concentration of impurity
The collector has the least concentration of impurity
The base has the least concentration of impurity

ANSWER DOWNLOAD EXAMIANS APP