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Electrical Engineering Objective Questions { Basic Concept of Electricity }



169. For a linear electromagnetic circuit, the following statement is true.
A. Field energy is equal to the co-energy
B. Field energy is greater than the co-energy
C. Field energy is lesser than the co-energy
D. Co-energy is zero
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170. The rated voltage of a 3-phase power system is given as
A. rms phase voltage
B. peak phase voltage
C. rms line to line voltage
D. peak line to line voltage
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171. The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper tube of 60 mm diameter is
A. 3.2 pH
B.3.2 mH
C. 32.0 mH
D. 3.2 H
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172. For a linear electromagnetic circuit, the following statement is true.
A. Field energy is equal to the co-energy
B. Field energy is greater than the co-energy
C. Field energy is lesser than the co-energy
D. Co-energy is zero
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173. The rated voltage of a 3-phase power system is given as
A. rms phase voltage
B. peak phase voltage
C. rms line to line voltage
D. peak line to line voltage
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174. The RMS value of the voltage u(t) = 3 + 4cos (3t) is
A. .1i77- V
B.5V
C. '7V
D. (3+ 24Y) V
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175. A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source v2(t) =3 sin (4t) V. the meter reads
A. 2 V
B.5 V
C. (2 + .&2) V
D. (117/2) V
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