Recent questions tagged operating

1 answer 12 views

Transistor operating configurations

asked May 20 by Shimroz123
1 answer 5 views

Draw construction of Megger and write operating principle of it.

asked Sep 6, 2018 by Shimroz123
1 answer 22 views

Explain the operating principle of LASER and list applications of LASER diode.

asked Sep 5, 2018 by Shimroz123
1 answer 26 views

The command line interpreter that enables the users to interact with operating system is called the A) Window B) Shell C) Process D) Kernel 

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 21 views

The operating point of a protective current transformer is near the

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 26 views

The operating time of instantaneous relay is

asked May 3, 2018 in Switchgear And Protection by Shimroz123
1 answer 22 views

A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :  (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 20 views

In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 24 views

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 56 views

The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) inversely proportional to α and Φ (C) directly proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
1 answer 38 views

In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is (A) sinusoidal current (B) constant dc current (C) continuous rectangular pulses (D) alternating rectangular pulses

asked Apr 28, 2018 in Power Electronics by Shimroz123
1 answer 23 views

Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, respectively. Then the system frequency is (A) 50 Hz (B) 51 Hz (C) 51.25 Hz (D) 51.5 Hz

asked Apr 28, 2018 in Electrical Machine by Shimroz123
1 answer 41 views

A 230 V/460 V single-phase transformer operating at 20 A and unity power factor has primary referred resistance of 0.2 Ω and reactance of 0.5 Ω. The approximate primary induced emf is (A) 216 V (B) 226 V (C) 234 V (D) 236 V

asked Apr 28, 2018 in Electrical Engineering by Shimroz123
1 answer 23 views

The secondary of a current transformer is always short-circuited under operating conditions because it?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 30 views

For a transformer, operating at constant load current, maximum efficiency will occur at?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 403 views

Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.

asked Feb 3, 2018 in Unit 1 by Quiz
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