In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

[EX Q]: When these devices exploit their voltage-dependent variable capacitance they are known as varactors. Barring the creation of local hot spots, a non-destructive avalanche current is produced by electron-hole pair propagation when the electric field within the (*) depletion region of these devices reaches a critical value. Majority carriers exist in an energy state greater than the Fermi energy in the Schottky barrier variety and those that operate in reverse breakdown are named after Zener. For 10 pointsname these devices that allow current to pass in only one direction.
[EX A]: Science

[EX Q]: Works during this man's Serialist period include the choral work The Dove Descending Breaks the Air and Threni along with a piece commemorating the poet Dylan Thomas. Early in his career he wrote songs such as "The Fairy's Kiss" and The Faun and the Shepherdess along with a popular concerto for orchestra known as Fireworks. His operatic works include the one-act work Rossignol and an opera about Nick Shadow with a libretto by W.H. Auden, The Rake's Progress, but he is better known for his Psalm Symphony and ballets like Petruschka. FTP, name this Russian composer of The Rite of Spring and The Firebird.
[EX A]: Fine Arts

[EX Q]: of this man's theories was inspired by the work of Dollard and Miller, and proposed that attention, retention, reproduction, and motivation were the four steps involved in learning. Later work by him focused on the importance of "self-efficacy" in therapy. An experiment conducted by this man included a model who assembled tinker toys as a part of its design, and initially included subjects playing with potato prints. That experiments shows that subjects were more likely to violently attack a namesake object when shown films of adults performing the same action. For 10 points, identify this psychologist best known for his work in the social learning theory as well as his Bobo Doll experiment.
[EX A]:
Social Science