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The term backlash is associated with?

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Positive logic in a logic circuit is one in which logic 0 voltage level is lower than logic 1 voltage level.

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1 answer 41 views

Which one of the following logic circuit has the highest speed as compared to the currently available logic circuits? A) Resistance-transistor logic B) Emitter-coupled logic C) Integrated-injection logic D) Diode-transistor logic 

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 8 views

Logic state 0 in positive logic corresponds to   1. zero voltage 2. positive voltage 3.higher voltage level 4. lower voltage level 

asked May 13, 2018 in Digital Electronics by Shimroz123
1 answer 13 views

In a positive edge triggered JK flip-flop, J = 1, K = 0 and clock pulse is rising, Q will be (a) 0 (b) 1 (c) showing no change (d) toggle 

asked May 26, 2018 in Digital Electronics by Shimroz123
1 answer 14 views

Read the following statements: i. Gate is a combinational logic. ii. JK Flip-flop in toggle mode is not combinational logic. iii. MSJK Flip-flop suffers from race-around. iv. Counters are sequential circuits. Which choice is correct? (A) i, ii (B) i, ii, iv (C) ii, iii, iv (D) i, ii, iii

asked May 24, 2018 in Digital Electronics by Shimroz123
1 answer 16 views

Out of the followings, which one is correct in case of a circuit breaker? (1) Making capacity = 2.55 X braking capacity (2) Braking capacity = 2.55 X making capacity (3) Making capacity = 1.8 X braking capacity (4) Braking capacity = 1.8 X making capacity

asked May 22, 2018 in Circuit breaker by Shimroz123
1 answer 9 views

 When A = 0., B = 0, C = 1 then in two input logic gate we get gate  (A) XOR gate (B) AND gate (C) NAND gate (D) NOR gate

asked May 17, 2018 in Digital Electronics by Shimroz123
1 answer 13 views

Which of the following circuits come under the class of sequential logic circuits ?   P. Full adder   Q. Full subtractor   R. Half adder   S. JK flip   T. Counter   Select the correct answer from the codes given below: (a) P and Q (b) Q and R (c) R and S (d) S and T

asked May 13, 2018 in Digital Electronics by Shimroz123
1 answer 17 views

Which of the following gates can be used to realize all possible combinational logic functions?  (i) OR gate (ii) NOR gate (iii) Exclusive OR gate (iv) NAND gate (v) AND gate  (A) (iii), (iv) and (v)  (B) (i), (iii) and (iv)  (C) (ii) and (iv)  (D) (i) and (v)

asked Apr 30, 2018 in Digital Electronics by Shimroz123
1 answer 10 views

Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

asked Mar 29, 2018 in Digital Electronics by Shimroz123
0 answers 12 views

In a series RLC circuit, which one does not change with change in input frequency ? (A) Bandwidth (B) Quality factor (C) Resonant frequency (D) All of them

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

What is not true in the context of “Don’t Care Condition” in digital logic ? (A) It corresponds to combination of logic variables whose value is not defined (B) It can be assumed to be 0 or 1 (C) It can be assumed to be 1 only (D) It helps in simplification of logic function

asked May 12, 2018 in Digital Electronics by Shimroz123
1 answer 22 views

The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is  (A) 4 (B) 6 (C) 8 (D) 10

asked May 18, 2018 in Digital Electronics by Shimroz123
1 answer 22 views

Which one is not a correct type of circuit breaker: A. Over Head circuit breaker B. Miniature Circuit Breaker C. Earth Leakage Circuit Breaker D. Oil Circuit Breaker 

asked Apr 12, 2018 in Electrical Engineering by Shimroz123
1 answer 13 views

A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles  (A) and AND gate (B) an OR gate (C) an XOR gate (D) a NAND gate

asked May 18, 2018 in Digital Electronics by Shimroz123
1 answer 8 views

One sine wave has a positive - going zero crossing at 15° and another sine wave has a positive - going zero crossing at 55°. The angle between the two waveforms is -  a) 0° b) 45° c) 40° d) None of the above

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
1 answer 14 views

The current mode logic (CML) is same as A) LSI B) CMOS C) TTL D) ECL

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 18 views

The complete set of only those Logic Gates designated as Universal Gates is  (A) NOT, OR and AND Gates (B) XNOR, NOR and NAND Gates (C) NOR and NAND Gates (D) XOR, NOR and NAND Gates

asked May 18, 2018 in Digital Electronics by Shimroz123
1 answer 593 views

In a step-up or step-down transformer, electrical power is transferred from one circuit to another without change in

asked May 14, 2018 in Transformer by Shimroz123
1 answer 33 views

In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR in another phase, results in (A) voltage notching (B) harmonic distortion (C) voltage sag (D) voltage swell

asked Apr 28, 2018 in Electronics Engineering by Shimroz123
0 answers 67 views

If one of the control springs of PMMC ammeter is broken when it is connected in a circuit, the meter will read  A) Half the correct value of current B) Twice the correct value of current C) An indefinite figure D) Zero

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
0 answers 13 views

The power in a 3phase circuit is measured with the help of 2 wattmeters. The reading of one of wattmeters is positive and that of the others is negative. The magnitude of readings is different. It can be concluded that the power factor of the circuit is  (A) Unity (B) 2 (lagging) (C) 5 (lagging) (D) Less than 0.5 (lagging)

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 16 views

The multivibrator circuit which processes one stable state and one quasi stable is   (a) Astabel (b) Monostable (c) Bistable (d) Schmitt trigger circuit

asked May 13, 2018 in Electronics Engineering by Shimroz123
1 answer 21 views

A 3-phase voltage source inverter is operated in 180o conduction mode. Which one of the following statements is true ?  (A) Both pole-voltage and line-voltage will have 3rd harmonic components (B) Pole-voltage will have 3rd harmonic component but line-voltage will be free from 3rd harmonic (C) Line-voltage will have 3rd harmonic component but pole-voltage will be free from 3rd harmonic (D) Both pole-voltage and line-voltage will be free from 3rd harmonic components

asked May 18, 2018 in Power Electronics by Shimroz123
1 answer 48 views

Which one of the following is not a transducer in the true sense?   (A) Thermocouple (B) Piezoelectric pick-up (C) Photo voltaic cell (D) LCD.

asked May 17, 2018 in Transducers and sensors by Shimroz123
1 answer 14 views

 ____ is known as a computer network in which one centralized, powerful computer is a hub to which many less powerful personal computers or workstations are connected. The clients run programs and access data that stored on the server.  a) Client-Server network b) Extranet c) Internet d) None of the above.

asked May 13, 2018 in Computer Engineering by Shimroz123
1 answer 9 views

For the circuit shown in figure, the Boolean expression for the output y in terms of inputs P, Q, R and S is

asked May 20, 2018 in Digital Electronics by Shimroz123
1 answer 8 views

The following logic families have their propagation delay. Arrange them from lowest propagation delay to highest propagation delay. 1. TTL (Standard) 2. ECL 3. Low power CMOS 4. DTL (A) 2, 1, 4 and 3 (B) 2, 4, 1 and 3 (C) 4, 2, 3 and 1 (D) 1, 2, 3 and 4

asked May 24, 2018 in Digital Electronics by Shimroz123
1 answer 14 views

Which of the following has got a positive susceptibility  1.Diamagnetic 2.Paramagnetic 3.Ferromagnetic 4.both Paramagnetic & ferromagnetic 

asked May 13, 2018 in Electrical Engineering by Shimroz123
1 answer 9 views

Which of the following describes the operation of a positive edge - triggered D -type flip-flop? a) if both inputs are HIGH, the output will toggle b) the output will follow the input on the leading edge of the clock c) - when both inputs are LOW, an invalid state exists d) the input is toggled into the flip-flop on the leading edge of the clock and is passed to the output on the trailing edge of the clock.

asked Apr 14, 2018 in Instrumentation and control by Shimroz123
1 answer 11 views

State the function of a contactor in a power circuit of locomotive. List different types of it and state one application of each.

asked Sep 2, 2018 by Shimroz123
0 answers 39 views

In a fullwave rectifier circuit with centre tap transformer, if voltage between one end of secondary winding and centre tap is 300V peak, then PIV (peak inverse voltage) is a. 300 V b. 150 V c. 600 V 5 d. 900 V

asked Apr 12, 2018 in Electronics Engineering by Shimroz123
1 answer 7 views

 For a NAND gate, when one or more inputs are low then the output will be A) Low B) High C) Alternately high and low D) High or low depending on relative magnitude of inputs 

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 8 views

Which code is used in constructing k-maps?  A) Hamming code B) 2 out of 5 code C) BCD code D) Gray code 

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 10 views

Registers in which data is entered or taken out in serial form are referred as   (A) left shift register (B) right shift register (C) shift registers (D) none of the above

asked May 17, 2018 in Digital Electronics by Shimroz123
1 answer 12 views

Which of the following voltage is used represent binary '1' in digital circuits .   1.0 V 2. 15 V 3. +5 V 4. 25 V 

asked May 13, 2018 in Digital Electronics by Shimroz123
1 answer 15 views

Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR

asked May 12, 2018 in Digital Electronics by Shimroz123
0 answers 16 views

Which side of the diode is positive?

asked Mar 15, 2018 in Electronics Engineering by Quiz
1 answer 37 views

Which is the positive terminal anode or cathode?

asked Dec 9, 2017 in Power Electronics by Quiz
1 answer 11 views

A switch tail ring counter is made by using a single D-FF. The resulting circuit is (A) T-FF (B) D-FF (C) SR-FF (D) JK-FF

asked Apr 28, 2018 in Digital Electronics by Shimroz123
1 answer 10 views
1 answer 16 views

In a Bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-pole system? (A) – 80 dB/decade (B) – 40 dB/decade (C) +40 dB/decade (D) +80 dB/decade

asked Apr 26, 2018 in Control System by Shimroz123
1 answer 425 views

The forces, which meet at one point, but their lines of action do not lie in a plane, are called?

asked Mar 22, 2018 in Engineering Mechanics by Shimroz123
1 answer 73 views

The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 28 views

Which of the following is used in a circuit breaker as the medium in which the arc forms? A) Insulating gas B) Insulating oil C) Vacuum D) All the above

asked Apr 29, 2018 in Electrical Engineering by Shimroz123

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