Bihar SBTE Diploma Mechanical 4th SEM May 2019 Paper on Foundation of EC
| Sr. No. | Questions with options |
| 1 | Electronics is that branch of engineering which deals with the application of
(a) Electronic devices (b) Generation of electronic components (c) Both (a) & (b) (d) None of these |
| 2 | Reverse saturation current in a germanium diode is the order of
(a) 1 Nano ampere (b) 1 Micro ampere (c) 1 Mampere (d) 10 Miliampere |
| 3 | Choke input filter is a
(a) Zero detector (b) Average detector (c) Peak detector (d) RMS detector |
| 4 | The emitter of a transistor is generally doped the heavies because it
(a) Has to dissipate maximum power (b) Has to supply the charge carriers (c) Is the first region of the transistor (d) Must posses low resistance |
| 5 | For an NPN bipolar transistor what is the main stream of current in the base region?
(a) Drift of holes (b) Diffusion of holes (c) Drift of electrons (d) Diffusion of electrons |
| 6 | Which one of the following specification is NOT correct for a common collector amplifier?
(a) High input impedance (b) Low output impedance (c) High voltage gain (d) High current gain |
| 7 | MSFET can be used as a
(a) Current controlled capacitor (b) Voltage controlled capacitor (c) Current controlled capacitor (d) Voltage controlled inductor |
| 8 | The most preferred high power output stage for hi-fi AF amplifier is of the
(a) Class B push – pull type (b) Class B single ended type (c) Class A type (d) Class C type |
| 9 | In push-pull amplifier there occurs cancellation
(a) Of even order harmonics (b) Off all odd order harmonics (c) As small as possible (d) None of these |
| 10 | The pattern form of a surface emitter LED is called a
(a) Isotropic pattern (b) Omni directional pattern (c) Directional pattern (d) Lambertain pattern |
| 11 | Latching current of an SCR is
(a) Below 10% (b) 10 – 20% (c) 20 – 25% (d) 25 – 30% |
| 12 | BCD code is
(a) A binary code (b) Uniweighted code (c) The same as gray code (d) The same thing as binary number |
| 13 | The output of a ‘AND’ gate is half if
(a) Both inputs are low (b) One input is high and other is low (c) Both input are high (d) None of the above |
| 14 | The complete set of only those logic gates designated as Universal gate is
(a) NOT, OR and AND gate (b) EXOR, and EXNOR gate (c) NOR and NAND gate (d) XOR and AND gate |
| 15 | Which of the following flip-flop is used as a latch?
(a) J – K flip flop (b) R – S flip flop (c) T flip flop (d) D flip flop |
| 16 | Which one of the following is the most sensitive device?
(a) Thermocouple (b) RTO (c) Thermistor (d) Pyrometer |
| 17 | The AND function can be realized by using only n numbers of ‘NOR’ gates on where n equal to
(a) 2 (b) 3 (c) 4 (d) 5 |
| 18 | An instrumentation amplifier uses
(a) 1 op-amps (b) 2 op-amps (c) 3 op-amps (d) 4 op-amps |
| 19 | UJT is know as
(a) Voltage controlled device (b) Current controlled device (c) Relaxation oscillator (d) None of the above |
| 20 | a triac is a
(a) 2 terminal switch (b) 2 terminal bilateral switch (c) 3 terminal unilateral switch (d) 3 terminal bidirectional switch |
| Data Collected By – Rashmi | |
| Published On – 28th May 2022 | |
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