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Consider the schema Sailors(sid, sname, rating, age) with the following data Sid Sname Rating age 22 Dustin 7 45 29 Borg 1 33 31 Pathy 8 55 32 Robert 8 25 58 Raghu 10 17 64 Herald 7 35 71 Vishnu 10 16 74 King 9 35 85 Archer 3 26 84 Bob 3 64 96 Flinch 3 17 For the query SELECT S.rating, AVG(S.age) AS avgage FROM Sailors S Where S.age >= 18 GROUP BY S.rating HAVING 1 < (SELECT COUNT(*) FROM Sailors S2 where S.rating = S2.rating) The number of rows returned is
Consider an NMOS transistor having kn= 2 mA/V2. Let the transistor be biased at VOV = 1V. For operation in saturation, what dc bias current ID results? If a +0.1-V signal is superimposed on VGS, find the corresponding increment in collector current by evaluating the total collector current ID and subtracting the dc bias current ID.
The total thermal resistance of a power transistor and heat sink is 20°C/W. The ambient temperature is 25°C and (TJ)MAX=200°C. If VCE=4V, find the maximum collector current that the transistor can carry without destruction. What will be the allowed value of collector current if ambient temperature rises to 75°C?
Choose the right option among the alternatives – A transistor conducts in its forward direction when its collector/emitter/base, is positive with respect to its collector/emitter/base, and when a turn-on voltage or current signal is applied to its collector/emitter/base.
Determine the value of emitter current and collector current of a transistor having α=0.98 and collector to base leakage current ICBO=4µA. The base current is 50µA.
In a silicon transistor, a change of 8 mA in emitter current produces a change of 7.8 mA in the collector current. What change in base current is necessary to produce an equivalent change in collector current?
The maximum power dissipation of a transistor is 100mW. If VCE = 20 V and β = 100 what is the maximum collector current that can be allowed without destruction of the transistor
When an electric current coil of a wattmeter is connected to the electric current path R and the voltage coil is connected between the electric current R path and the neutral side of the balanced three phase supply, it shows 10 kW. The line voltage along the phase sequence RYB is 400 V. The current drawn by the current path is 54 A. What is the new reading of the wattmeter if the voltage coil is connected between the lines B and the Y paths, even if the electric current coil is continuously present in the line R?
Which of the following statement/s is/are relating to credit rating agencies?
1. The three largest credit rating agencies rate India's sovereign debt at the highest investment grade.
2. CRISIL is the largest credit rating agency in India but is not among the largest three in the world.
3. The three largest credit rating agencies in the world are Moody's, Standard and Poor's and Fitch.
Below stated are some of the statements about the Alternating current. You need to identify which of the following is incorrect, 1. DC power is far more powerful than AC power. The efficiency and power to size characteristics of DC motors and apparatuses are increased. Lighting by DC (LED) is 75% more efficient than lighting from incandescence. 2. A comparatively high voltage alternating current may be generated and easily raised and dropped by the static equipment known as the transformer, which makes electrical energy transmission and distribution economical, 3. Initial costs and maintenance of the AC motor are less expensive since it has no switch and is less powerful than the DC motor for constant working speed, hence it is desired to create power as alternating current. 4. The great efficiency of transmission in ac makes electric power generation cost-effective, Produced in huge quantities in one station and distributed throughout a vast area.