GATE EE

Measurement of Energy and Power

Electrical and Electronics Measurement

(Past Years Questions)

Marks 1

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Two wattmeter method is used for measurement of power in a balanced three-phase load supplied from a balanced three-phas...
GATE EE 2018
A 3-phase balanced load which has a power factor of 0.707 is connected to a balanced supply. The power consumed by the l...
GATE EE 2015 Set 2
An $$LPF$$ wattmeter of power factor $$0.2$$ is having three voltage settings $$300V,$$ $$150V$$ and $$75V,$$ and two cu...
GATE EE 2014 Set 3
While measuring power of a three-phase balanced load by the two-wattmeter method, the readings are $$100$$ $$W$$ and $$2...
GATE EE 2014 Set 2
Power consumed by a balanced $$3$$-phase, $$3$$-wire load is measured by the two wattmeter method. The first wattmeter r...
GATE EE 2014 Set 1
For the circuit shown in the figure, the voltage and current expressions are $$v\left( t \right) = {E_1}\sin \left( {\o...
GATE EE 2012
Consider the following statement: (i) The compensating coil of a low power factor wattmeter compensates the effect of th...
GATE EE 2011
A wattmeter is connected as shown in the fig. the wattmeter reads ...
GATE EE 2010
A sampling wattmeter (that computes power from simultaneously sampled values of voltage and current) is used to measure ...
GATE EE 2006
The circuit in fig is used to measure the power consumed by the load. The current coil and the voltage coil of the watt ...
GATE EE 2004
The line to line input voltage to the $$3$$ phase, $$50$$ Hz, ac circuit shown in fig is $$100$$ $$V$$ $$r.m.s$$ Assumin...
GATE EE 2002
The minimum number of wattmeter(s) required to measure 3 $$-$$ phase, 3 $$-$$ wire balanced or unbalanced power is
GATE EE 2001
Electro dynamic type watt meters have large errors while measuring power in a.c circuits at low power factor conditions,...
GATE EE 1999
A dynamometer type wattmeter responds to the
GATE EE 1997
A water boiler at home is switched on to the $$A.C$$ mains supplying power at $$230$$ $$V/50$$ $$Hz.$$ The frequency of ...
GATE EE 1996
The moving coil in a dynamometer wattmeter is connected
GATE EE 1996
VRN, VYN and VBN are the instantaneous line to neutral voltages and iR, iY and iB are instantaneous line currents in a ...
GATE EE 1993

Marks 2

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The load shown in the figure is supplied by a $$400$$ $$V$$ (line-to-line) $$3$$-phase source ($$RYB$$ sequence). The lo...
GATE EE 2017 Set 1
The coils of a wattmeter have resistances $$0.01$$ $$\Omega $$ and $$1000$$ $$\Omega $$; their inductances may be neglec...
GATE EE 2015 Set 2
The figure shows a three phase delta connected load supplied from a $$400V,$$ $$50Hz,$$ $$3\phi $$ balanced source. The ...
GATE EE 2009
A $$3$$ $$V$$ $$dc$$ supply with an internal resistance of $$2\,\,\Omega $$ supplies a passive non-linear resistance cha...
GATE EE 2007
An energy meter connected to an immersion heater (resistive) operating on an $$AC$$ $$230V,$$ $$50$$ $$Hz,$$ $$AC$$ sing...
GATE EE 2006
Two wattmeter's, which are connected to measure the total power on a three-phase system supplying a balanced load, read ...
GATE EE 2005
A single-phase load is connected between $$R$$ and $$Y$$ terminals of a $$415$$ $$V,$$ symmetrical, $$3$$-phase, $$4$$-w...
GATE EE 2004
A dc A-h meter is rated for 15 A, 250V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be...
GATE EE 2004
A wattmeter reads $$400$$ $$W$$ when its current coil is connected in the $$R$$ phase and its pressure coil is connected...
GATE EE 2003
The voltage-flux adjustment of a certain $$1$$-phase $$220$$ $$V$$ induction watt-hour meter is altered so that the phas...
GATE EE 2003
The two wattmeter method is used to measure active power on a three phase, three wire system. If the phase voltage is un...
GATE EE 2000
The voltage phasor of a circuit is $$10\angle {15^ \circ }V$$ and the current phasor is $$2\angle - {45^ \circ }A.$$ Th...
GATE EE 1999
For the circuit shown in Fig, the wattmeter reading will be .... W and the power dissipted in the load is ......W ...
GATE EE 1997

Marks 5

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A $$3$$ - $$\phi $$ load operates with balanced voltages applied to its terminals, and draws balanced currents. The pote...
GATE EE 2000
A symmetrical $$400V,$$ $$3$$-$$\phi $$ supply is connected to the network shown in fig. The phase sequence is $$RYB.$$ ...
GATE EE 1998

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