ASSIGNMENT 1 Complete on mark reading form 1. What is the fourth harmonic of a f

Question

ASSIGNMENT 1 Complete on mark reading form 1. What is the fourth harmonic of a fundamental frequency of 400Hz? 1) 1.6kHz 2) 4Hz 3) 4kHz 4) 100 2. In both induction and synchronous ac motors 1) 2) 3) 4) The operating speed is very steady The stator magnetic field rotates The squirrel cage forms the rotor The stator magnetic field is stationary 3. The 'Superposition theorem" is essentially based on the concept of 1) duality 2) inearity 3) reciprocity 4) non-linearity 4. The power factor of a purely resistive circuit is 1) zero unity 3) lagging 4) leading 5. The power taken by a 3-phase load is given by the expression 1) 3VL IL cos 3) V3VL IL sin 4) 3VLIL sin

Explanation / Answer

1.option a

2.option b

3.option b

4.option b

5.option b

vol rm =Vl

current rms=Il

power factor=cos

so p=Vl*Il*cos

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