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 The IF BW of a radar receiver is inversely proportional to the (A) Pulse width (B) prf (C) Pulse interval (D) Square root of the peak transmitted frequency

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asked Jun 18, 2018 in Electrical Engineering by Shimroz123
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asked May 17, 2018 in Amplifier by Shimroz123
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asked Jun 18, 2018 in Electrical Engineering by Shimroz123
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A 1000W heater is rated to operate at a direct current (DC) of 10A. If the heater is supplied alternating current (AC) for producing the same quantity of heat the value of current should be  a. Iav=10A b. Irms=10A c. Ipeak=10A 

asked May 17, 2018 in Electrical Engineering by Shimroz123
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If the inertia constant H of a machine of 200 MVA is 2 p.u., its value corresponding to 400 MVA will be   (a) 4 p.u. (b) 2 p.u. (c) 1.0 p.u. (d) 0.5 p.u. 

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Which of the following will happen if a voltmeter is connected like an ammeter in series to the load ? (A) There will be almost no current in the circuit. (B) The meter will burn. (C) The measurement will be trio high. (D)  A very high current will flow.

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What will happen if the primary of a transformer is connected to D.C. supply?  (A) Transformer will operate with low efficiency (B) Transformer will operate with high efficiency (C) No effect (D) Transformer may start to smoke and burn 

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asked Apr 9, 2018 in Electrical Engineering by Shimroz123
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A coil having 90 turns is connected to a 120 V, 60 Hz source. If the effective value of the magnetizing current is 4 A. Calculate the inductance of the coil.  (A) 79.6 mH (B) 121.2 mH (C) 32.2 mH (D) 83.16 mH

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1 answer 57 views

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asked Jun 18, 2018 in Electrical Engineering by Shimroz123
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For a short line if the receiving end voltage is equal to the sending end voltage under loaded conditions: a) the sending end power factor is unity b) the receiving -end power factor is unity c) the sending-end power factor is leading d) the receiving end power factor is leading

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
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 A standard AM broadcast station is allowed to transmit modulating frequencies up to 5 kHz. If the AM station is transmitting on a frequency of 980 kHz, compute the maximum and minimum upper and lower sidebands and the total bandwidth occupied by the AM station : (A) 10 kHz (B) 975 kHz (C) 990 kHz (D) 20 kHz

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
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 A series generator is supplying power to DC bus bar. If the prime mover fails, then the machine will operate as (A) DC series motor rotating in the same direction (B) DC series motor rotating in the opposite direction (C) DC series generator rotating in the same direction (D) Machine will stop

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
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An alternator is connected to a bus. For a symmetrical fault at the bus, the fault level is 60 MVA. If another alternator is connected to the same bus, the new fault level will be (1) 120 MVA (2) 60 MVA (3) 30 MVA (4) 15 MVA 

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
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A series RLC circuit resonate at 200 Hz. If the capacitance is increased to four times, the circuit will be in resonance at   (a) 100 Hz (b) 200 Hz (c) 400 Hz (d) 800 Hz  

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In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will?

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In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123

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