1
GATE EE 2015 Set 2
Numerical
+2
-0
The coils of a wattmeter have resistances $$0.01$$ $$\Omega$$ and $$1000$$ $$\Omega$$; their inductances may be neglected. The wattmeter is connected as shown in the figure, to measure the power consumed by a load, which draws $$25$$ $$A$$ at power factor $$0.8$$. The voltage across the load terminals is $$30$$ $$V$$. The percentage error on the wattmeter reading is______________.
2
GATE EE 2009
+2
-0.6
The figure shows a three phase delta connected load supplied from a $$400V,$$ $$50Hz,$$ $$3\phi$$ balanced source. The pressure coil and current coil of a wattmeter are connected to the load as shown. With the coil polarities suitably selected to ensure a positive deflection. The wattmeter reading will be.
A
$$0$$
B
$$1600$$ Watt
C
$$800$$ Watt
D
$$400$$ Watt
3
GATE EE 2007
+2
-0.6
A $$3$$ $$V$$ $$dc$$ supply with an internal resistance of $$2\,\,\Omega$$ supplies a passive non-linear resistance characterized by the relation $${V_{NL}} = {\rm I}_{NL}^2.$$ The power dissipated in the non-linear resistance is
A
$$1.0$$ $$W$$
B
$$1.5$$ $$W$$
C
$$2.5$$ $$W$$
D
$$3.0$$ $$W$$
4
GATE EE 2006
+2
-0.6
An energy meter connected to an immersion heater (resistive) operating on an $$AC$$ $$230V,$$ $$50$$ $$Hz,$$ $$AC$$ single phase source reads $$2.3$$ units ($$kWh$$) in $$1$$ hour. The heater is removed from the supply and now connected to a $$4000$$ $$V$$ peak to peak square wave source of $$150$$ $$Hz.$$ The power in $$kW$$ dessipated by the heater will be
A
$$3.478$$
B
$$1.739$$
C
$$1.540$$
D
$$0.870$$
EXAM MAP
Medical
NEET