WorksheetsECA 1
Total questions: 10
Worksheet time: 5mins
The reciprocal of resistance is:
Coloumbs
Henry
Conducatance
Impedance
The current Io in Fig. below is:
4A
3A
2A
1A
In a Y-Y system, a line voltage of 220 V produces a phase voltage of
127
156
311
381
In a Delta - Delta system, a phase voltage of 100 V produces a line voltage of:
71
58
100
141
The instrument for measuring average power is the:
Voltmeter
Wattmeter
Ammeter
Varmeter
In the power triangle shown in Fig., the reactive power is:
1000 VAR Leading
866 VAR Leading
1000 VAR Lagging
866 VAR Lagging
A parallel RLC circuit has L = 2 H and C = 0.25 F. The value of R that will produce unity damping factor is ___ Ohm
0.5
1
2
4
In the circuit of Fig., v(∞) is:
10V
6V
0V
5V
The time constant for an RL circuit with R = 2 Ohms and L = 4 H is:
0.5S
2S
4S
6S
If the current through a 10-mH inductor increases from zero to 2 A, how much energy is stored in the inductor?
40mJ
20mJ
10mJ
60mJ
