Questions 21–30 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 3 of 7

Question 21

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EEMCQ1 markNeeds review
In the circuit shown below, a three-phase star-connected unbalanced load is connected to a balanced three-phase supply of

with phase sequence

. The star connected load has

and

. The value of

in

, for which the voltage difference across the nodes

and

is zero, is
Diagram for Electrical Engineering question 21

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Question 22

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A charger supplies 100 W at 20 V for charging the battery of a laptop. The power devices, used in the converter inside the charger, operate at a switching frequency of 200 kHz. Which power device is best suited for this purpose?
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Question 23

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A long conducting cylinder having a radius ‘b’ is placed along the z axis. The current density is

for the region

where

is the distance in the radial direction. The magnetic field intensity (

) for the region inside the conductor (i.e. for

) is
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Question 24

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The type of single-phase induction motor, expected to have the maximum power factor during steady state running condition, is
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Question 25

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For the circuit shown below with ideal diodes, the output will be
Diagram for Electrical Engineering question 25

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Question 26

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A MOD 2 and a MOD 5 up-counter when cased together results in a MOD ______ counter. (in integer)

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Question 27

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An inductor having a

-factor of 60 is connected in series with a capacitor having a

-factor of 240. The overall

-factor of the circuit is _________. (round off to nearest integer)

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Question 28

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The network shown below has a resonant frequency of 150 kHz and a bandwidth of 600 Hz. The

-factor of the network is __________. (round off to nearest integer)
Diagram for Electrical Engineering question 28


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Question 29

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The maximum clock frequency in MHz of a 4-stage ripple counter, utilizing flip-flops, with each flip-flop having a propagation delay of 20 ns, is ____________. (round off to one decimal place)

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Question 30

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If only 5% of the supplied power to a cable reaches the output terminal, the power loss in the cable, in decibels, is _________. (round off to nearest integer)

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