1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
Two wattmeter's, which are connected to measure the total power on a three-phase system supplying a balanced load, read $$10.5$$ $$kW$$ and $$–2.5$$ $$kW$$ respectively. The total power and the power factor respectively are
A
$$13.0$$ $$kW,$$ $$0.334$$
B
$$13.0$$ $$kW,$$ $$0.684$$
C
$$8.0$$ $$kW,$$ $$0.52$$
D
$$8.0$$ $$kW,$$ $$0.334$$
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
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 expressed as
A
3750 rev/kWh
B
3600 rev/kWh
C
1000 rev/kWh
D
960 rev/kWh
3
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A single-phase load is connected between $$R$$ and $$Y$$ terminals of a $$415$$ $$V,$$ symmetrical, $$3$$-phase, $$4$$-wire system with phase sequence $$RYB$$. A wattmeter is connected in the system as shown in figure. The power factor of the load is $$0.8 $$ lagging. The wattmeter will read GATE EE 2004 Electrical and Electronics Measurement - Measurement of Energy and Power Question 12 English
A
$$-795$$ $$W$$
B
$$-597$$ $$W$$
C
$$+597$$ $$W$$
D
$$+795$$ $$W$$
4
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A wattmeter reads $$400$$ $$W$$ when its current coil is connected in the $$R$$ phase and its pressure coil is connected between this phase and the neutral of a symmetrical $$3$$-phase system supplying a balanced star connected $$0.8$$ $$p.f.$$ inductive load. The phase sequence is $$RYB.$$ What will be the reading of this wattmeter if its pressure coil alone is reconnected between the $$B$$ and $$Y$$ phases, all other connections remaining as before?
A
$$400.0$$
B
$$519.6$$
C
$$300.0$$
D
$$692.8$$
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