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Electrical Engineering

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Home/EEE - Electrical and Electronics Engineering/Electrical Engineering
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Query KaroQK#001
Asked: February 5, 2022In: Electrical Engineering

One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993kg/m³. If the centre of mass of water is 50 meters above the turbine and the losses are negligible, the energy produced by that volume of water is:

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9.49%(a) 140MWhr. ( 15 voters )
9.49%(b) 120MWhr. ( 15 voters )
16.46%(c) 130MWhr. ( 26 voters )
64.56%(d) 135.3MWhr. ( 102 voters )
Based On 158 Votes

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 5, 2022 at 5:05 pm

    Answer is (d).

    Answer is (d).

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Query KaroQK#001
Asked: February 2, 2022In: Electrical Engineering

A rotating electrical machine having its self inductances of both the stator and the rotor windings, independent of rotor position will definitely not develop

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40.4%(a) reluctance torque. ( 40 voters )
8.08%(b) hysteresis torque. ( 8 voters )
42.42%(c) synchronising torque. ( 42 voters )
9.09%(d) starting torque. ( 9 voters )
Based On 99 Votes

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[GATE EE, 2004] 

[GATE EE, 2004] 

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 2, 2022 at 8:40 pm

    Answer is (c).

    Answer is (c).

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Query KaroQK#001
Asked: February 2, 2022In: Electrical Engineering

A circular metallic disc is placed in a vertical magnetic field of constant induction in the downward direction. If the disc is rotated in a horizontal plane, the emf induced will be

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2.08%(a) decreasing radially in the outward direction. ( 1 voter )
22.92%(b) increasing radially in the outward direction. ( 11 voters )
10.42%(c) constant independent of disc size. ( 5 voters )
64.58%(d) zero. ( 31 voters )
Based On 48 Votes

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[AMIE, 1994] 

[AMIE, 1994] 

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  1. Mukesh Pandit
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    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 2, 2022 at 8:45 pm

    Answer is (d).

    Answer is (d).

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Query KaroQK#001
Asked: February 5, 2022In: Electrical Engineering

If power P available from a hydro scheme is given by the formula P=9.81QH, where Q is the flow rate through the turbine in l/s and H is the head in meters, then P will be in units of

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2.22%(a) kWh ( 1 voter )
31.11%(b) kJ/s ( 14 voters )
8.89%(c) HP ( 4 voters )
57.78%(d) W ( 26 voters )
Based On 45 Votes

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  1. Mukesh Pandit
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    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 5, 2022 at 5:09 pm

    Answer is (d).

    Answer is (d).

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Query KaroQK#001
Asked: March 17, 2022In: DC Machines

A conductor is rotating within a magnetic field. At which of the positions do the peak voltage occur?

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2.44%(a) Anywhere. ( 1 voter )
4.88%(b) At 45° angels to the axis of the magnetic field. ( 2 voters )
51.22%(c) Along the axis of the magnetic field. ( 21 voters )
41.46%(d) At right angles to the axis of the magnetic field. ( 17 voters )
Based On 41 Votes

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a conductor rotating in a magnetic fieldconductorconductor is rotating within a magnetic fieldmagnetic field
  1. Mukesh Pandit
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    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on March 17, 2022 at 6:32 pm

    The answer is (c).

    The answer is (c).

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Query KaroQK#001
Asked: February 2, 2022In: Electrical Engineering

The flux created by the current flowing through the primary winding induces emf in

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60%(a) both primary and secondary windings. ( 9 voters )
0%(b) transformer core only. ( 0 voters )
26.67%(c) secondary winding only. ( 4 voters )
13.33%(d) primary winding only. ( 2 voters )
Based On 15 Votes

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  1. Mukesh Pandit
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    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 2, 2022 at 9:37 pm

    Answer is (a).

    Answer is (a).

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Query KaroQK#001
Asked: January 30, 2022In: Electrical Engineering

Three equal resistances are connected in the star. If this star is converted into the equivalent delta, the resistances of both the networks will be equal.

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90.91%True ( 10 voters )
9.09%False ( 1 voter )
Based On 11 Votes

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on January 30, 2022 at 10:08 am

    False

    False

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Query KaroQK#001
Asked: January 30, 2022In: Electrical Engineering

Static magnetic fields induce currents in closed conducting loops.

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0%True ( 0 voters )
100%False ( 4 voters )
Based On 4 Votes

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[GATE EE, 1994] 

[GATE EE, 1994] 

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on January 30, 2022 at 9:39 am

    False  

    False

     

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Query KaroQK#001
Asked: February 2, 2022In: Electrical Engineering

If rated dc voltage is applied instead of ac to the primary of a transformer

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25%(a) there will be no secondary voltage. ( 1 voter )
0%(b) secondary voltage will be excessively high. ( 0 voters )
75%(c) primary of transformer will burn. ( 3 voters )
0%(d) secondary of transformer will burn. ( 0 voters )
Based On 4 Votes

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on February 2, 2022 at 9:53 pm

    Answer is (c).

    Answer is (c).

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Query KaroQK#001
Asked: January 30, 2022In: Electrical Engineering

To prevent local action in a battery only distilled water is used in electrolytes.

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100%True ( 1 voter )
0%False ( 0 voters )
Based On 1 Vote

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  1. Mukesh Pandit
    Best Answer
    Mukesh Pandit NCT# Chief Marketing Officer
    Added an answer on January 30, 2022 at 2:17 pm

    True

    True

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