Problem: Please answer a question about the following article about Transistor:
BJTs have three terminals, corresponding to the three layers of semiconductoran emitter, a base, and a collector. They are useful in amplifiers because the currents at the emitter and collector are controllable by a relatively small base current. In an npn transistor operating in the active region, the emitterbase junction is forward biased (electrons and holes recombine at the junction), and electrons are injected into the base region. Because the base is narrow, most of these electrons will diffuse into the reverse-biased (electrons and holes are formed at, and move away from the junction) basecollector junction and be swept into the collector; perhaps one-hundredth of the electrons will recombine in the base, which is the dominant mechanism in the base current. By controlling the number of electrons that can leave the base, the number of electrons entering the collector can be controlled. Collector current is approximately (common-emitter current gain) times the base current. It is typically greater than 100 for small-signal transistors but can be smaller in transistors designed for high-power applications.
What is the usual collector current for small-signal transistors?
A: greater than 100
Problem: Please answer a question about the following article about Madonna (entertainer):
In 2012, Madonna performed at Super Bowl XLVI halftime show, visualized by Cirque Du Soleil and Jamie King and featured special guests LMFAO, Nicki Minaj, M.I.A. and Cee Lo Green. It became the then most-watched Super Bowl halftime show in history with 114 million viewers, higher than the game itself. It was also revealed that the singer had signed a three-album deal with Interscope Records, who would act as the distributor in partnership with her 360 deal with Live Nation. Her twelfth studio album, MDNA, was released in March 2012 and saw collaboration with various producers, most notably with William Orbit again and Martin Solveig. The album was well received by music critics, with Priya Elan from NME calling it "a ridiculously enjoyable romp", citing its "psychotic, soul-bearing stuff" as "some of the most visceral stuff she's ever done." MDNA debuted at number one on the Billboard 200 and many other countries worldwide. Madonna surpassed Elvis Presley's record for the most number-one album by a solo artist in the UK. The lead single "Give Me All Your Luvin'", featuring guest vocals from Minaj and M.I.A., became Madonna's record-extending 38th top-ten hit on the Billboard Hot 100.
Which year did Madonna performed at the Super Bowl?
A: 2012
Problem: Please answer a question about the following article about MP3:
As sound scholar Jonathan Sterne notes, "An Australian hacker acquired l3enc using a stolen credit card. The hacker then reverse-engineered the software, wrote a new user interface, and redistributed it for free, naming it "thank you Fraunhofer"".
How much did the new released program by the hacker cost?
A: free
Problem: Please answer a question about the following article about Law of the United States:
In turn, according to Kozinski's analysis, the contemporary rule of binding precedent became possible in the U.S. in the nineteenth century only after the creation of a clear court hierarchy (under the Judiciary Acts), and the beginning of regular verbatim publication of U.S. appellate decisions by West Publishing. The rule gradually developed, case-by-case, as an extension of the judiciary's public policy of effective judicial administration (that is, in order to efficiently exercise the judicial power). The rule of precedent is generally justified today as a matter of public policy, first, as a matter of fundamental fairness, and second, because in the absence of case law, it would be completely unworkable for every minor issue in every legal case to be briefed, argued, and decided from first principles (such as relevant statutes, constitutional provisions, and underlying public policies), which in turn would create hopeless inefficiency, instability, and unpredictability, and thereby undermine the rule of law.
What made binding precedent a possibility?
A:
creation of a clear court hierarchy (under the Judiciary Acts), and the beginning of regular verbatim publication of U.S. appellate decisions by West Publishing