VAR Meter

Q. The voltage phasor of a circuit is $10\angle {15}^{\circ }V$ and the current phasor is $2\angle -{45}^{\circ }A$. The active and the reactive powers in the circuit are

1. $10Wand17.32VAR$
2. $5Wand8.66VAR$
3. $20Wand60VAR$
4. $20\sqrt{2}Wand10\sqrt{2}VAR$

Q. A 3-phase balanced R-L load is connected to a 3-phase balanced symmetrical 400 V, 50 Hz, RYB sequence mains as shown in figure. The wattmeter W reads 1.732 kW. Then,

1. the active power in the load is 1.732 kW
2. the reactive power of the load is 1.732 kVAr
3. the active power in the load is 3 kW
4. the reactive power of the load is 3 kVAr

Q. Two wattmeters are connected to measure power in a 3-phase network. The two readings are 2000 watts and 1000 watts respectively. If another wattmeter to be connected such that its current coil is in one phase and the potential coil is across the other two phase terminals. Then the reading of wattmeter is _______VAR.

1. $100$
2. $1000$
3. $1000\sqrt{3}$
4. $3000$