01․ In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be
02․ In above question, if circuit efficiency is 90 %. What will be output power ?
Output power = efficiency X ( P1 + P2 ).
03․ Consider the following circuit : Switch is closed at t = 0 Find i(0 +)
04․ In question no.3, which of the following is true ?
05․ A 10 Ohm resistor has power rating of 1W. Find the maximum current rating.
I2R = 1; I = √0.1 = 0.316 A
06․ What would be the power given by source V2?
Among two voltage source, only 10 V source will deliver power to 5 V voltage source.
07․ Consider the following circuit. What is the value of i ?
Voltage source will offer zero resistance path to current. So net current in 1 Ω resistance depends on only voltage source. So current = 5 X i = 5 A.
08․ In above question, power given in the 5 V source is
Source current = 5 - 1 = 4 Amp. Power given by the 5 V source = 5 X 4 = 20 W.
09․ Total power consumed in the circuit below is 10 W. Find X.
Total power consumed = x2 X 2 + 22/2 ∴ 10 W = 2x2 + 2 Therefore, x = 2 A.
10․ If Vout = 1 V for 1 kHz input then what would be Vout for 10 kHz for same input ?