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You Are On Multi Choice Question Bank SET 1045

52251. A transistor used in a digital circuit will have two operating states, which are cutoff and saturation.



52252. When a transistor is operating as a variable resistor it has transistance.



52253. In a BJT, the collector current is approximately equal to the base current.



52254. The voltage gain of a transistor is inversely proportional to the change in output current.



52255. The three bipolar transistor circuit configurations are common-base, common-emitter, and emitter-follower.



52256. When troubleshooting a bipolar junction transistor using an ohmmeter, if one of the junctions reads low in both directions, the junction is shorted and the transistor is bad. If one of the junctions reads high in both directions, the junction is shorted and the transistor is good.



52257. BJTs are "junction" transistors because they use current-carrying P-N junctions.



52258. The voltage measured from the collector to the emitter is the sum of the base-emitter voltage plus the collector-base voltage.



52259. Transistors are controlled to operate as a switch or to operate as a variable resistor.



52260. If this circuit were used in a digital circuit, it would be a NOT gate.



52261. A common-emitter (C-E) is so called because the emitter is connected to both the input and output signals.



52262. Current gain in a transistor is inversely proportional to collector current.



52263. In a common-base (C-B) amplifier, the output is 180 degrees out of phase with the input.



52264. A bipolar transistor has three leads: the base, collector, and emitter.



52265. The polarity of VBE is such that it reverse biases the base-emitter junction.



52266. With a common-collector (C-C) amplifier the input is applied to the base and the output is taken from the emitter.



52267. The resolution to start the Quit India Movement was adopted by INC at its session held at?





52268. The input resistance of the base of an emitter-follower is usually _________.





52269. The phase difference between the input and output ac voltage signals of a common-emitter amplifier is __________.





52270. Base bias provides _________.





52271. VCE approximately equals ________ when a transistor switch is cut off.





52272. The input resistance, Rin of a common-collector amplifier, consists of ____________.




52273. The signal voltage gain of an amplifier, AV, is defined as __________.


52274. VCE approximately equals ________ when a transistor switch is in saturation.





52275. An emitter-follower has a voltage gain that is __________.





52276. When transistors are used in digital circuits they usually operate in the:





52277. Three different Q points are shown on a dc load line. The upper Q point represents the:





52278. A transistor has a of 250 and a base current, IB, of 20 A. The collector current, IC, equals:





52279. A current ratio of IC/IE is usually less than one and is called:





52280. With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:





52281. When a 4.7 F capacitor is connected to a 1 kHz source, what is its capacitive reactance?





52282. What is the total capacitance?





52283. What is this circuit?





52284. After which time constant can a capacitor be considered to be fully charged?





52285. You could increase the time constant of an RC circuit by





52286. A capacitor's rate of charge is considered:





52287. A resistor and an output capacitor form a series circuit with a square wave applied. The circuit is:





52288. If an open capacitor is checked with an ohmmeter, the needle will:





52289. What is the circuit's total current?





52290. As a capacitor is being charged, current flowing into the capacitor will:





52291. What is the phase shift between the voltage across the resistor and the voltage from the source?





52292. A capacitor stores energy within a dielectric between the conducting plates in the form of:





52293. As a capacitor is being charged, the voltage across its terminals will:





52294. With a 500 kHz signal source, what would be the value of a capacitor yielding a capacitive reactance of 1 k ?





52295. After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?





52296. If a current of 40 mA flows through a series circuit consisting of a 0.4 F capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?





52297. What is the capacitance of the circuit shown in the given circuit?





52298. In an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?





52299. What is the total opposition to current in a series RC circuit called?





52300. Find the missing term in the series - 100,102,105,110,117,––––?





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