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In-circuit erasing and programming (without uv light) is done in the case of 

A) MROM B) PROM C) EPROM D) EEPROM

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In TDM systems, channel separation is done with the use of  (a) AND gates (b) band-pass filters (c) differentiator circuit (d) integrator circuit

asked Apr 9, 2018 in Electronics Engineering 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 13 views

In case of a 3-phase short-circuit fault in a system, the power fed into the system is   (a) Mostly reactive (b) Reactive only (c) Mostly active (d) Active and Reactive both equal 

asked May 13, 2018 in Electrical Engineering by Shimroz123
0 answers 12 views

What is the maximum number of points of light, fan and socket-outlets that can be connected in one sub-circuit ?   (a) 5 (b) 10 (c) 20 (d) 30 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
1 answer 16 views

Maximum number of light points allowed in a 5 A circuit (not exceeding 800W) is

asked May 14, 2018 in Electrical Engineering by Shimroz123
1 answer 6 views

These self inductance of a circuit is defined as twice the work done against the induced e.m.f. on establishing unit current in the coil. If the current to be established in the coil is doubled, the work done against the induced e.m.f. will be  1. Doubled  2. Halved  3. four times  4. Quarter times 

asked May 13, 2018 in Electrical Engineering 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 17 views

Light load adjustments for induction type energy meters are usually done at   (a) 10% of full load current (b) 5% of full load current (c) 50% of full load current (d) 1% of full load current 

asked May 13, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 15 views

The r.m.s. value and mean value is the same in the case of?

asked Mar 24, 2018 in Electrical Engineering by Shimroz123
1 answer 9 views
1 answer 34 views

If the feedback factor of an amplifier is 0.1 and its gain without feedback is 40, then its gain with feedback is (a) – 13.3 (b) 200 (c) 8 (d) 10 

asked May 25, 2018 in Amplifier by Shimroz123
1 answer 18 views

In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: (1) 10 µA (2) 100 µA (3) 1 A (4) 10 A 

asked May 29, 2018 in Electronics Engineering by Shimroz123
1 answer 60 views

The measurement of dielectric loss and power factor is done using  (A) Weins Bridge (B) Hays Bridge (C) Schering Bridge (D) Wheat Stone Bridge 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 11 views

In air-core cable the surge voltage travels approximately at the speed of light and a cable of 100m length gives a delay of a. 0.666μsec b. 0.333μsec c. 1.555μsec d. 1μsec 

asked Sep 1, 2018 by Shimroz123
1 answer 14 views

Two incandescent light bulbs of 40 Wand 60 W rating are connected in series across the mains, then .  A) The bulbs together consume 100 W B) The bulbs together consume 50 W C) The 60 W bulb glows brighter D) The 40 W bulb glows brighter

asked May 20, 2018 in Network Analysis by Shimroz123
1 answer 47 views

Rectification efficiency of a full wave rectifier without filter is nearly equals to:  (1) 51% (2) 61% (3) 71% (4) 81%

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 30 views

Light is confined within the core of a simple optical fiber by:  (1) Refraction. (2) Total internal reflection at the outer edge of the cladding. (3) Total internal reflection at the core cladding boundary. (4) Reflection from the fiber's plastic coating.

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
0 answers 10 views

What is the cause for light or dark recording of EEG?  A) Pen is not touching properly B) Ink tubes are clogged C) Incorrectly loaded paper D) Lead connection problem

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 58 views

Starting torque can be obtained in the case of a single phase induction motor with identical main and auxiliary windings by connecting:  (1) A capacitor across the mains (2) A capacitor in series with the machine (3) A capacitor is series with the auxiliary winding (4) Equal value capacitors in series with the main and the auxiliary windings

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
0 answers 12 views

What is the name of programming/scripting language of Flash  (1) Action Script (2) Animation script (3) Java script (4) None of these

asked Apr 10, 2018 in Computer Engineering by Shimroz123
1 answer 30 views

The voltage gains of the amplifier with and without feedback are 20 and 100 respectively. The percentage of negative feedback would be

asked May 3, 2018 in Power Electronics by Shimroz123
1 answer 28 views

Two light bulbs are connected in series across a 120 V battery. Bulb 1 uses 40 W of power and Bulb 2 uses 20 W of power. If bulb 1 alone is connected to the 120 V source, then it will consume (A) 90 W (B) 80 W (C) 60 W (D) 180 W

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 20 views

When measuring strain, ballast circuit use a capacitor to act as a high pass filter. This is done when:  a) Static strain are being measured b) Dynamic strain are being measured c) Both Static and dynamic strain are being measured d) None of the above

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
0 answers 14 views

Silicon is not suitable for fabrication of light emitting diodes because it is : a. An indirect band gap semiconductor b. A direct band gap semiconductor c. A wide band gap semiconductor d. A narrow band gap semiconductor

asked Apr 12, 2018 in Electronics Engineering by Shimroz123
0 answers 18 views

What is the role of a capacitor in a circuit?

asked Mar 15, 2018 in Electronics Engineering by Quiz
1 answer 11 views

Maximum current will flow through an electrical circuit in case of___________. A. Ohm’s Law B. open circuit C. parallel circuit D. Short circuit 

asked Apr 12, 2018 in Electrical Engineering by Shimroz123
1 answer 32 views

A series RLC circuit has a resonant frequency of 1 KHz and a quality factor Q = 100. If each of the R,L and C is doubled from its original value, the new Q of the circuit is:  (1) 25 (2) 50 (3) 100 (4) 200

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 18 views

The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is:  (1) 25 ohm (2) 50 ohm (3) 75 ohm (4) 100 ohm

asked Apr 9, 2018 in Electronics 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
0 answers 18 views

In cellular scheme, the frequency reuse is done in all the cells (a) adjacent to the cell (b) except in those immediately adjacent cells (c) within a city (d) having low power transmitters

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 25 views

An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: (1) 1/11 kΩ (2) 1/5 kΩ (3) 5 kΩ (4) 11 kΩ

asked May 29, 2018 in Amplifier by Shimroz123
1 answer 11 views

The system voltage is enhanced during heavy load condition and reduced during light load condition by using (A) shunt capacitor (B) shunt reactor (C) active power filter (D) static VAR Compensator

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 10 views

If the distance between the light source and the surface is reduced to half, the illumination on the surface will   (a) reduce to half of the original. (b) reduce to one fourth of the original. (c) increase to double of the original. (d) increase to four times of the original. 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
1 answer 23 views

A reading of 120 is obtained when a standard inductor was connected in the circuit of a Q-meter and the variable capacitor is adjusted to a value of 300 pF. A lossless capacitor of unknown value Cx is then connected in parallel with the variable capacitor and the same reading was obtained when the variable capacitor is readjusted to a value of 200 pF. The value of Cx in pF is  A) 100 B) 200 C) 300 D) 500

asked May 20, 2018 in Electrical Measurements and Instrumentation 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
0 answers 12 views

In a clipper circuit with silicon diode and bias of V volts, the clipping level is (a) 0.7 V (c) V (b) V + 0.7 (d) 2V + 0.7

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
0 answers 22 views

In a series RLC circuit, the rms value of voltage across the resistor is 30 V, across the inductor is 60 V and across the capacitor is 20 V. The rms supply voltage would be (A) 110 V (B) 10 V (C) 220 V (D) 50 V

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 67 views

In a Y -connected circuit, between each line -voltage and the nearest phase - voltage, there is a phase -angle of: A. 0° B. 30° C. 60° D. 120°

asked Apr 12, 2018 in Electrical Engineering by Shimroz123
1 answer 75 views

What is the value of susceptibility in case of vacuum? A) 1 B) 0.5 C) ∞ D) 0 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at the surface of a conductor is everywhere directed normal to the surface C) The conductor surface is an equivalent potential surface D) None of the above

asked Jun 17, 2018 in Electrical Engineering by Shimroz123

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