Electronics

A. holes in n-type and free electrons in p-type
B. holes in n-type and p-type
C. free electrons in n-type and holes in p-type
D. free electrons in n-type and p-type

A. collector
B. emitter
C. base
D. any of above

A. capacitor
B. inductor
C. on switch
D. off switch

A. pentavalent
B. trivalent
C. divalent
D. tetravalent

A. majority carriers
B. minority carriers
C. dual carriers
D. blockers