WILL GIVE BRAINLIEST AND 30 POINTS!
An NPN transistor is used as a switch in a circuit. What happens when a voltage is applied to the base?

A. Current flows from the collector to the emitter.
B. Current flows from the emitter to the collector.
C. Current flows from the base to the collector.
D. No current will flow.

Asimply means that over time there was some sort of change.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.